Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - kasan updates

 - procfs

 - lib/bitmap updates

 - other lib/ updates

 - checkpatch tweaks

 - rapidio

 - ubsan

 - pipe fixes and cleanups

 - lots of other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
  Documentation/sysctl/user.txt: fix typo
  MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
  MAINTAINERS: update various PALM patterns
  MAINTAINERS: update "ARM/OXNAS platform support" patterns
  MAINTAINERS: update Cortina/Gemini patterns
  MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
  MAINTAINERS: remove ANDROID ION pattern
  mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
  mm: docs: fix parameter names mismatch
  mm: docs: fixup punctuation
  pipe: read buffer limits atomically
  pipe: simplify round_pipe_size()
  pipe: reject F_SETPIPE_SZ with size over UINT_MAX
  pipe: fix off-by-one error when checking buffer limits
  pipe: actually allow root to exceed the pipe buffer limits
  pipe, sysctl: remove pipe_proc_fn()
  pipe, sysctl: drop 'min' parameter from pipe-max-size converter
  kasan: rework Kconfig settings
  crash_dump: is_kdump_kernel can be boolean
  kernel/mutex: mutex_is_locked can be boolean
  ...

Documentation/sysctl/user.txt

@@ -3,7 +3,7 @@ Documentation for /proc/sys/user/*	kernel version 4.9.0
 
 ==============================================================
 
-This file contains the documetation for the sysctl files in
+This file contains the documentation for the sysctl files in
 /proc/sys/user.
 
 The files in this directory can be used to override the default

MAINTAINERS

@@ -903,7 +903,6 @@ L:	devel@driverdev.osuosl.org
 S:	Supported
 F:	drivers/staging/android/ion
 F:	drivers/staging/android/uapi/ion.h
-F:	drivers/staging/android/uapi/ion_test.h
 
 AOA (Apple Onboard Audio) ALSA DRIVER
 M:	Johannes Berg <johannes@sipsolutions.net>
@@ -1308,7 +1307,6 @@ M:	Russell King <linux@armlinux.org.uk>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 T:	git git://git.armlinux.org.uk/~rmk/linux-arm.git clkdev
-F:	arch/arm/include/asm/clkdev.h
 F:	drivers/clk/clkdev.c
 
 ARM/COMPULAB CM-X270/EM-X270 and CM-X300 MACHINE SUPPORT
@@ -1360,7 +1358,7 @@ F:	Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt
 F:	Documentation/devicetree/bindings/net/cortina,gemini-ethernet.txt
 F:	Documentation/devicetree/bindings/rtc/faraday,ftrtc010.txt
 F:	arch/arm/mach-gemini/
-F:	drivers/net/ethernet/cortina/gemini/*
+F:	drivers/net/ethernet/cortina/
 F:	drivers/pinctrl/pinctrl-gemini.c
 F:	drivers/rtc/rtc-ftrtc010.c
 
@@ -1737,9 +1735,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-oxnas@lists.tuxfamily.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-oxnas/
-F:	arch/arm/boot/dts/ox8*.dtsi
-F:	arch/arm/boot/dts/wd-mbwe.dts
-F:	arch/arm/boot/dts/cloudengines-pogoplug-series-3.dts
+F:	arch/arm/boot/dts/ox8*.dts*
 N:	oxnas
 
 ARM/PALM TREO SUPPORT
@@ -1747,8 +1743,7 @@ M:	Tomas Cech <sleep_walker@suse.com>
 L:	linux-arm-kernel@lists.infradead.org
 W:	http://hackndev.com
 S:	Maintained
-F:	arch/arm/mach-pxa/include/mach/palmtreo.h
-F:	arch/arm/mach-pxa/palmtreo.c
+F:	arch/arm/mach-pxa/palmtreo.*
 
 ARM/PALMTX,PALMT5,PALMLD,PALMTE2,PALMTC SUPPORT
 M:	Marek Vasut <marek.vasut@gmail.com>
@@ -1757,12 +1752,10 @@ W:	http://hackndev.com
 S:	Maintained
 F:	arch/arm/mach-pxa/include/mach/palmtx.h
 F:	arch/arm/mach-pxa/palmtx.c
-F:	arch/arm/mach-pxa/include/mach/palmt5.h
-F:	arch/arm/mach-pxa/palmt5.c
+F:	arch/arm/mach-pxa/palmt5.*
 F:	arch/arm/mach-pxa/include/mach/palmld.h
 F:	arch/arm/mach-pxa/palmld.c
-F:	arch/arm/mach-pxa/include/mach/palmte2.h
-F:	arch/arm/mach-pxa/palmte2.c
+F:	arch/arm/mach-pxa/palmte2.*
 F:	arch/arm/mach-pxa/include/mach/palmtc.h
 F:	arch/arm/mach-pxa/palmtc.c
 
@@ -1771,8 +1764,7 @@ M:	Sergey Lapin <slapin@ossfans.org>
 L:	linux-arm-kernel@lists.infradead.org
 W:	http://hackndev.com
 S:	Maintained
-F:	arch/arm/mach-pxa/include/mach/palmz72.h
-F:	arch/arm/mach-pxa/palmz72.c
+F:	arch/arm/mach-pxa/palmz72.*
 
 ARM/PLEB SUPPORT
 M:	Peter Chubb <pleb@gelato.unsw.edu.au>
@@ -1801,7 +1793,6 @@ F:	drivers/clk/qcom/
 F:	drivers/dma/qcom/
 F:	drivers/soc/qcom/
 F:	drivers/spi/spi-qup.c
-F:	drivers/tty/serial/msm_serial.h
 F:	drivers/tty/serial/msm_serial.c
 F:	drivers/*/pm8???-*
 F:	drivers/mfd/ssbi.c
@@ -3567,7 +3558,7 @@ F:	drivers/media/platform/coda/
 
 COMMON CLK FRAMEWORK
 M:	Michael Turquette <mturquette@baylibre.com>
-M:	Stephen Boyd <sboyd@codeaurora.org>
+M:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-clk@vger.kernel.org
 Q:	http://patchwork.kernel.org/project/linux-clk/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
@@ -10284,7 +10275,7 @@ F:	include/uapi/linux/openvswitch.h
 OPERATING PERFORMANCE POINTS (OPP)
 M:	Viresh Kumar <vireshk@kernel.org>
 M:	Nishanth Menon <nm@ti.com>
-M:	Stephen Boyd <sboyd@codeaurora.org>
+M:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-pm@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git
@@ -13020,7 +13011,7 @@ F:	Documentation/networking/spider_net.txt
 F:	drivers/net/ethernet/toshiba/spider_net*
 
 SPMI SUBSYSTEM
-R:	Stephen Boyd <sboyd@codeaurora.org>
+R:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-arm-msm@vger.kernel.org
 F:	Documentation/devicetree/bindings/spmi/
 F:	drivers/spmi/
@@ -13905,7 +13896,7 @@ F:	include/linux/usb/tilegx.h
 TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER
 M:	John Stultz <john.stultz@linaro.org>
 M:	Thomas Gleixner <tglx@linutronix.de>
-R:	Stephen Boyd <sboyd@codeaurora.org>
+R:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-kernel@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
 S:	Supported

Makefile

@@ -434,7 +434,8 @@ export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 
 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
-export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_KASAN CFLAGS_UBSAN
+export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
+export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
@@ -679,6 +680,10 @@ endif
 # This selects the stack protector compiler flag. Testing it is delayed
 # until after .config has been reprocessed, in the prepare-compiler-check
 # target.
+ifdef CONFIG_CC_STACKPROTECTOR_AUTO
+  stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
+  stackp-name := AUTO
+else
 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
   stackp-flag := -fstack-protector
   stackp-name := REGULAR
@@ -687,16 +692,40 @@ ifdef CONFIG_CC_STACKPROTECTOR_STRONG
   stackp-flag := -fstack-protector-strong
   stackp-name := STRONG
 else
+  # If either there is no stack protector for this architecture or
+  # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
+  # is empty, skipping all remaining stack protector tests.
+  #
   # Force off for distro compilers that enable stack protector by default.
-  stackp-flag := $(call cc-option, -fno-stack-protector)
+  KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
+endif
 endif
 endif
 # Find arch-specific stack protector compiler sanity-checking script.
-ifdef CONFIG_CC_STACKPROTECTOR
+ifdef stackp-name
+ifneq ($(stackp-flag),)
   stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
   stackp-check := $(wildcard $(stackp-path))
+  # If the wildcard test matches a test script, run it to check functionality.
+  ifdef stackp-check
+    ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+      stackp-broken := y
+    endif
+  endif
+  ifndef stackp-broken
+    # If the stack protector is functional, enable code that depends on it.
+    KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
+    # Either we've already detected the flag (for AUTO) or we'll fail the
+    # build in the prepare-compiler-check rule (for specific flag).
+    KBUILD_CFLAGS += $(stackp-flag)
+  else
+    # We have to make sure stack protector is unconditionally disabled if
+    # the compiler is broken (in case we're going to continue the build in
+    # AUTO mode).
+    KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
+  endif
+endif
 endif
-KBUILD_CFLAGS += $(stackp-flag)
 
 ifeq ($(cc-name),clang)
 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
@@ -1091,14 +1120,25 @@ PHONY += prepare-compiler-check
 prepare-compiler-check: FORCE
 # Make sure compiler supports requested stack protector flag.
 ifdef stackp-name
+  # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
+  ifeq ($(stackp-flag),)
+	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
+		  Compiler does not support any known stack-protector >&2
+  else
+  # Fail if specifically requested stack protector is missing.
   ifeq ($(call cc-option, $(stackp-flag)),)
 	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
 		  $(stackp-flag) not supported by compiler >&2 && exit 1
   endif
+  endif
 endif
-# Make sure compiler does not have buggy stack-protector support.
-ifdef stackp-check
-  ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+# Make sure compiler does not have buggy stack-protector support. If a
+# specific stack-protector was requested, fail the build, otherwise warn.
+ifdef stackp-broken
+  ifeq ($(stackp-name),AUTO)
+	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
+                  $(stackp-flag) available but compiler is broken: disabling >&2
+  else
 	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                   $(stackp-flag) available but compiler is broken >&2 && exit 1
   endif

arch/Kconfig

@@ -538,16 +538,10 @@ config HAVE_CC_STACKPROTECTOR
 	  - its compiler supports the -fstack-protector option
 	  - it has implemented a stack canary (e.g. __stack_chk_guard)
 
-config CC_STACKPROTECTOR
-	def_bool n
-	help
-	  Set when a stack-protector mode is enabled, so that the build
-	  can enable kernel-side support for the GCC feature.
-
 choice
 	prompt "Stack Protector buffer overflow detection"
 	depends on HAVE_CC_STACKPROTECTOR
-	default CC_STACKPROTECTOR_NONE
+	default CC_STACKPROTECTOR_AUTO
 	help
 	  This option turns on the "stack-protector" GCC feature. This
 	  feature puts, at the beginning of functions, a canary value on
@@ -564,7 +558,6 @@ config CC_STACKPROTECTOR_NONE
 
 config CC_STACKPROTECTOR_REGULAR
 	bool "Regular"
-	select CC_STACKPROTECTOR
 	help
 	  Functions will have the stack-protector canary logic added if they
 	  have an 8-byte or larger character array on the stack.
@@ -578,7 +571,6 @@ config CC_STACKPROTECTOR_REGULAR
 
 config CC_STACKPROTECTOR_STRONG
 	bool "Strong"
-	select CC_STACKPROTECTOR
 	help
 	  Functions will have the stack-protector canary logic added in any
 	  of the following conditions:
@@ -596,6 +588,12 @@ config CC_STACKPROTECTOR_STRONG
 	  about 20% of all kernel functions, which increases the kernel code
 	  size by about 2%.
 
+config CC_STACKPROTECTOR_AUTO
+	bool "Automatic"
+	help
+	  If the compiler supports it, the best available stack-protector
+	  option will be chosen.
+
 endchoice
 
 config THIN_ARCHIVES

arch/arm/include/asm/bitops.h

@@ -338,6 +338,7 @@ static inline int find_next_bit_le(const void *p, int size, int offset)
 
 #endif
 
+#include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/le.h>
 
 /*

arch/arm64/include/asm/kasan.h

@@ -12,7 +12,8 @@
 
 /*
  * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
- * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses.
+ * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses,
+ * where N = (1 << KASAN_SHADOW_SCALE_SHIFT).
  */
 #define KASAN_SHADOW_START      (VA_START)
 #define KASAN_SHADOW_END        (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
@@ -20,14 +21,16 @@
 /*
  * This value is used to map an address to the corresponding shadow
  * address by the following formula:
- *     shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET;
+ *     shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET
  *
- * (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END]
- * cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET
- * should satisfy the following equation:
- *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
+ * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range
+ * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual
+ * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation:
+ *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END -
+ *				(1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT))
  */
-#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << (64 - 3)))
+#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << \
+					(64 - KASAN_SHADOW_SCALE_SHIFT)))
 
 void kasan_init(void);
 void kasan_copy_shadow(pgd_t *pgdir);

arch/arm64/include/asm/memory.h

@@ -85,7 +85,8 @@
  * stack size when KASAN is in use.
  */
 #ifdef CONFIG_KASAN
-#define KASAN_SHADOW_SIZE	(UL(1) << (VA_BITS - 3))
+#define KASAN_SHADOW_SCALE_SHIFT 3
+#define KASAN_SHADOW_SIZE	(UL(1) << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
 #define KASAN_THREAD_SHIFT	1
 #else
 #define KASAN_SHADOW_SIZE	(0)

arch/arm64/kernel/perf_event.c

@@ -925,9 +925,8 @@ static void __armv8pmu_probe_pmu(void *info)
 	pmceid[0] = read_sysreg(pmceid0_el0);
 	pmceid[1] = read_sysreg(pmceid1_el0);
 
-	bitmap_from_u32array(cpu_pmu->pmceid_bitmap,
-			     ARMV8_PMUV3_MAX_COMMON_EVENTS, pmceid,
-			     ARRAY_SIZE(pmceid));
+	bitmap_from_arr32(cpu_pmu->pmceid_bitmap,
+			     pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS);
 }
 
 static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)

arch/arm64/mm/kasan_init.c

@@ -135,7 +135,8 @@ static void __init kasan_pgd_populate(unsigned long addr, unsigned long end,
 /* The early shadow maps everything to a single page of zeroes */
 asmlinkage void __init kasan_early_init(void)
 {
-	BUILD_BUG_ON(KASAN_SHADOW_OFFSET != KASAN_SHADOW_END - (1UL << 61));
+	BUILD_BUG_ON(KASAN_SHADOW_OFFSET !=
+		KASAN_SHADOW_END - (1UL << (64 - KASAN_SHADOW_SCALE_SHIFT)));
 	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, PGDIR_SIZE));
 	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE));
 	kasan_pgd_populate(KASAN_SHADOW_START, KASAN_SHADOW_END, NUMA_NO_NODE,

arch/ia64/kernel/perfmon.c

@@ -2610,17 +2610,10 @@ pfm_get_task(pfm_context_t *ctx, pid_t pid, struct task_struct **task)
 	if (pid < 2) return -EPERM;
 
 	if (pid != task_pid_vnr(current)) {
-
-		read_lock(&tasklist_lock);
-
-		p = find_task_by_vpid(pid);
-
 		/* make sure task cannot go away while we operate on it */
-		if (p) get_task_struct(p);
-
-		read_unlock(&tasklist_lock);
-
-		if (p == NULL) return -ESRCH;
+		p = find_get_task_by_vpid(pid);
+		if (!p)
+			return -ESRCH;
 	}
 
 	ret = pfm_task_incompatible(ctx, p);

arch/m68k/include/asm/bitops.h

@@ -311,7 +311,6 @@ static inline int bfchg_mem_test_and_change_bit(int nr,
  *	functions.
  */
 #if defined(CONFIG_CPU_HAS_NO_BITFIELDS)
-#include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ffz.h>
 #else
 
@@ -441,6 +440,8 @@ static inline unsigned long ffz(unsigned long word)
 
 #endif
 
+#include <asm-generic/bitops/find.h>
+
 #ifdef __KERNEL__
 
 #if defined(CONFIG_CPU_HAS_NO_BITFIELDS)

arch/score/kernel/setup.c

@@ -124,9 +124,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	unsigned long n = (unsigned long) v - 1;
 
-	seq_printf(m, "processor\t\t: %ld\n", n);
-	seq_printf(m, "\n");
-
+	seq_printf(m, "processor\t\t: %ld\n\n", n);
 	return 0;
 }
 

arch/unicore32/include/asm/bitops.h

@@ -44,4 +44,6 @@ static inline int fls(int x)
 #define find_first_bit		find_first_bit
 #define find_first_zero_bit	find_first_zero_bit
 
+#include <asm-generic/bitops/find.h>
+
 #endif /* __UNICORE_BITOPS_H__ */

arch/x86/Kconfig

@@ -324,7 +324,7 @@ config X86_64_SMP
 
 config X86_32_LAZY_GS
 	def_bool y
-	depends on X86_32 && !CC_STACKPROTECTOR
+	depends on X86_32 && CC_STACKPROTECTOR_NONE
 
 config ARCH_SUPPORTS_UPROBES
 	def_bool y

arch/x86/include/asm/kasan.h

@@ -4,6 +4,7 @@
 
 #include <linux/const.h>
 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
+#define KASAN_SHADOW_SCALE_SHIFT 3
 
 /*
  * Compiler uses shadow offset assuming that addresses start
@@ -12,12 +13,15 @@
  * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
  */
 #define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
-					((-1UL << __VIRTUAL_MASK_SHIFT) >> 3))
+					((-1UL << __VIRTUAL_MASK_SHIFT) >> \
+						KASAN_SHADOW_SCALE_SHIFT))
 /*
- * 47 bits for kernel address -> (47 - 3) bits for shadow
- * 56 bits for kernel address -> (56 - 3) bits for shadow
+ * 47 bits for kernel address -> (47 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
+ * 56 bits for kernel address -> (56 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
  */
-#define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1ULL << (__VIRTUAL_MASK_SHIFT - 3)))
+#define KASAN_SHADOW_END        (KASAN_SHADOW_START + \
+					(1ULL << (__VIRTUAL_MASK_SHIFT - \
+						  KASAN_SHADOW_SCALE_SHIFT)))
 
 #ifndef __ASSEMBLY__
 

drivers/perf/arm_dsu_pmu.c

@@ -658,10 +658,8 @@ static void dsu_pmu_probe_pmu(struct dsu_pmu *dsu_pmu)
 		return;
 	cpmceid[0] = __dsu_pmu_read_pmceid(0);
 	cpmceid[1] = __dsu_pmu_read_pmceid(1);
-	bitmap_from_u32array(dsu_pmu->cpmceid_bitmap,
-				DSU_PMU_MAX_COMMON_EVENTS,
-				cpmceid,
-				ARRAY_SIZE(cpmceid));
+	bitmap_from_arr32(dsu_pmu->cpmceid_bitmap, cpmceid,
+			  DSU_PMU_MAX_COMMON_EVENTS);
 }
 
 static void dsu_pmu_set_active_cpu(int cpu, struct dsu_pmu *dsu_pmu)

drivers/pps/generators/pps_gen_parport.c

@@ -70,7 +70,7 @@ static long hrtimer_error = SAFETY_INTERVAL;
 /* the kernel hrtimer event */
 static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 {
-	struct timespec expire_time, ts1, ts2, ts3, dts;
+	struct timespec64 expire_time, ts1, ts2, ts3, dts;
 	struct pps_generator_pp *dev;
 	struct parport *port;
 	long lim, delta;
@@ -78,7 +78,7 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 
 	/* We have to disable interrupts here. The idea is to prevent
 	 * other interrupts on the same processor to introduce random
-	 * lags while polling the clock. getnstimeofday() takes <1us on
+	 * lags while polling the clock. ktime_get_real_ts64() takes <1us on
 	 * most machines while other interrupt handlers can take much
 	 * more potentially.
 	 *
@@ -88,22 +88,22 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 	local_irq_save(flags);
 
 	/* first of all we get the time stamp... */
-	getnstimeofday(&ts1);
-	expire_time = ktime_to_timespec(hrtimer_get_softexpires(timer));
+	ktime_get_real_ts64(&ts1);
+	expire_time = ktime_to_timespec64(hrtimer_get_softexpires(timer));
 	dev = container_of(timer, struct pps_generator_pp, timer);
 	lim = NSEC_PER_SEC - send_delay - dev->port_write_time;
 
 	/* check if we are late */
 	if (expire_time.tv_sec != ts1.tv_sec || ts1.tv_nsec > lim) {
 		local_irq_restore(flags);
-		pr_err("we are late this time %ld.%09ld\n",
-				ts1.tv_sec, ts1.tv_nsec);
+		pr_err("we are late this time %lld.%09ld\n",
+				(s64)ts1.tv_sec, ts1.tv_nsec);
 		goto done;
 	}
 
 	/* busy loop until the time is right for an assert edge */
 	do {
-		getnstimeofday(&ts2);
+		ktime_get_real_ts64(&ts2);
 	} while (expire_time.tv_sec == ts2.tv_sec && ts2.tv_nsec < lim);
 
 	/* set the signal */
@@ -113,25 +113,25 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 	/* busy loop until the time is right for a clear edge */
 	lim = NSEC_PER_SEC - dev->port_write_time;
 	do {
-		getnstimeofday(&ts2);
+		ktime_get_real_ts64(&ts2);
 	} while (expire_time.tv_sec == ts2.tv_sec && ts2.tv_nsec < lim);
 
 	/* unset the signal */
 	port->ops->write_control(port, NO_SIGNAL);
 
-	getnstimeofday(&ts3);
+	ktime_get_real_ts64(&ts3);
 
 	local_irq_restore(flags);
 
 	/* update calibrated port write time */
-	dts = timespec_sub(ts3, ts2);
+	dts = timespec64_sub(ts3, ts2);
 	dev->port_write_time =
-		(dev->port_write_time + timespec_to_ns(&dts)) >> 1;
+		(dev->port_write_time + timespec64_to_ns(&dts)) >> 1;
 
 done:
 	/* update calibrated hrtimer error */
-	dts = timespec_sub(ts1, expire_time);
-	delta = timespec_to_ns(&dts);
+	dts = timespec64_sub(ts1, expire_time);
+	delta = timespec64_to_ns(&dts);
 	/* If the new error value is bigger then the old, use the new
 	 * value, if not then slowly move towards the new value. This
 	 * way it should be safe in bad conditions and efficient in
@@ -161,17 +161,17 @@ static void calibrate_port(struct pps_generator_pp *dev)
 	long acc = 0;
 
 	for (i = 0; i < (1 << PORT_NTESTS_SHIFT); i++) {
-		struct timespec a, b;
+		struct timespec64 a, b;
 		unsigned long irq_flags;
 
 		local_irq_save(irq_flags);
-		getnstimeofday(&a);
+		ktime_get_real_ts64(&a);
 		port->ops->write_control(port, NO_SIGNAL);
-		getnstimeofday(&b);
+		ktime_get_real_ts64(&b);
 		local_irq_restore(irq_flags);
 
-		b = timespec_sub(b, a);
-		acc += timespec_to_ns(&b);
+		b = timespec64_sub(b, a);
+		acc += timespec64_to_ns(&b);
 	}
 
 	dev->port_write_time = acc >> PORT_NTESTS_SHIFT;
@@ -180,9 +180,9 @@ static void calibrate_port(struct pps_generator_pp *dev)
 
 static inline ktime_t next_intr_time(struct pps_generator_pp *dev)
 {
-	struct timespec ts;
+	struct timespec64 ts;
 
-	getnstimeofday(&ts);
+	ktime_get_real_ts64(&ts);
 
 	return ktime_set(ts.tv_sec +
 			((ts.tv_nsec > 990 * NSEC_PER_MSEC) ? 1 : 0),

drivers/rapidio/devices/tsi721_dma.c

@@ -222,7 +222,7 @@ static int tsi721_bdma_ch_free(struct tsi721_bdma_chan *bdma_chan)
 	struct tsi721_device *priv = to_tsi721(bdma_chan->dchan.device);
 #endif
 
-	if (bdma_chan->bd_base == NULL)
+	if (!bdma_chan->bd_base)
 		return 0;
 
 	/* Check if DMA channel still running */
@@ -346,7 +346,7 @@ tsi721_desc_fill_init(struct tsi721_tx_desc *desc,
 {
 	u64 rio_addr;
 
-	if (bd_ptr == NULL)
+	if (!bd_ptr)
 		return -EINVAL;
 
 	/* Initialize DMA descriptor */
@@ -370,7 +370,7 @@ tsi721_desc_fill_init(struct tsi721_tx_desc *desc,
 static int
 tsi721_desc_fill_end(struct tsi721_dma_desc *bd_ptr, u32 bcount, bool interrupt)
 {
-	if (bd_ptr == NULL)
+	if (!bd_ptr)
 		return -EINVAL;
 
 	/* Update DMA descriptor */
@@ -555,9 +555,7 @@ static void tsi721_advance_work(struct tsi721_bdma_chan *bdma_chan,
 	 * If there is no data transfer in progress, fetch new descriptor from
 	 * the pending queue.
 	*/
-
-	if (desc == NULL && bdma_chan->active_tx == NULL &&
-					!list_empty(&bdma_chan->queue)) {
+	if (!desc && !bdma_chan->active_tx && !list_empty(&bdma_chan->queue)) {
 		desc = list_first_entry(&bdma_chan->queue,
 					struct tsi721_tx_desc, desc_node);
 		list_del_init((&desc->desc_node));
@@ -735,7 +733,7 @@ static dma_cookie_t tsi721_tx_submit(struct dma_async_tx_descriptor *txd)
 static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-	struct tsi721_tx_desc *desc = NULL;
+	struct tsi721_tx_desc *desc;
 	int i;
 
 	tsi_debug(DMA, &dchan->dev->device, "DMAC%d", bdma_chan->id);
@@ -754,9 +752,6 @@ static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
 	desc = kcalloc(dma_txqueue_sz, sizeof(struct tsi721_tx_desc),
 			GFP_ATOMIC);
 	if (!desc) {
-		tsi_err(&dchan->dev->device,
-			"DMAC%d Failed to allocate logical descriptors",
-			bdma_chan->id);
 		tsi721_bdma_ch_free(bdma_chan);
 		return -ENOMEM;
 	}
@@ -799,7 +794,7 @@ static void tsi721_free_chan_resources(struct dma_chan *dchan)
 
 	tsi_debug(DMA, &dchan->dev->device, "DMAC%d", bdma_chan->id);
 
-	if (bdma_chan->bd_base == NULL)
+	if (!bdma_chan->bd_base)
 		return;
 
 	tsi721_bdma_interrupt_enable(bdma_chan, 0);

drivers/rapidio/rio.c

@@ -81,6 +81,7 @@ u16 rio_local_get_device_id(struct rio_mport *port)
 
 	return (RIO_GET_DID(port->sys_size, result));
 }
+EXPORT_SYMBOL_GPL(rio_local_get_device_id);
 
 /**
  * rio_query_mport - Query mport device attributes
@@ -110,9 +111,8 @@ EXPORT_SYMBOL(rio_query_mport);
  */
 struct rio_net *rio_alloc_net(struct rio_mport *mport)
 {
-	struct rio_net *net;
+	struct rio_net *net = kzalloc(sizeof(*net), GFP_KERNEL);
 
-	net = kzalloc(sizeof(struct rio_net), GFP_KERNEL);
 	if (net) {
 		INIT_LIST_HEAD(&net->node);
 		INIT_LIST_HEAD(&net->devices);
@@ -243,18 +243,17 @@ int rio_request_inb_mbox(struct rio_mport *mport,
 	int rc = -ENOSYS;
 	struct resource *res;
 
-	if (mport->ops->open_inb_mbox == NULL)
+	if (!mport->ops->open_inb_mbox)
 		goto out;
 
-	res = kzalloc(sizeof(struct resource), GFP_KERNEL);
-
+	res = kzalloc(sizeof(*res), GFP_KERNEL);
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
 
 		/* Make sure this mailbox isn't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -277,6 +276,7 @@ int rio_request_inb_mbox(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
 
 /**
  * rio_release_inb_mbox - release inbound mailbox message service
@@ -305,6 +305,7 @@ int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
 
 /**
  * rio_request_outb_mbox - request outbound mailbox service
@@ -326,18 +327,17 @@ int rio_request_outb_mbox(struct rio_mport *mport,
 	int rc = -ENOSYS;
 	struct resource *res;
 
-	if (mport->ops->open_outb_mbox == NULL)
+	if (!mport->ops->open_outb_mbox)
 		goto out;
 
-	res = kzalloc(sizeof(struct resource), GFP_KERNEL);
-
+	res = kzalloc(sizeof(*res), GFP_KERNEL);
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
 
 		/* Make sure this outbound mailbox isn't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -360,6 +360,7 @@ int rio_request_outb_mbox(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
 
 /**
  * rio_release_outb_mbox - release outbound mailbox message service
@@ -388,6 +389,7 @@ int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
 
 /**
  * rio_setup_inb_dbell - bind inbound doorbell callback
@@ -405,13 +407,10 @@ rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
 		    void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
 				  u16 info))
 {
-	int rc = 0;
-	struct rio_dbell *dbell;
+	struct rio_dbell *dbell = kmalloc(sizeof(*dbell), GFP_KERNEL);
 
-	if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!dbell)
+		return -ENOMEM;
 
 	dbell->res = res;
 	dbell->dinb = dinb;
@@ -420,9 +419,7 @@ rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
 	mutex_lock(&mport->lock);
 	list_add_tail(&dbell->node, &mport->dbells);
 	mutex_unlock(&mport->lock);
-
-      out:
-	return rc;
+	return 0;
 }
 
 /**
@@ -444,17 +441,16 @@ int rio_request_inb_dbell(struct rio_mport *mport,
 			  void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
 					u16 dst, u16 info))
 {
-	int rc = 0;
-
-	struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+	int rc;
+	struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
 
 	if (res) {
 		rio_init_dbell_res(res, start, end);
 
 		/* Make sure these doorbells aren't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -467,6 +463,7 @@ int rio_request_inb_dbell(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
 
 /**
  * rio_release_inb_dbell - release inbound doorbell message service
@@ -508,6 +505,7 @@ int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
 
 /**
  * rio_request_outb_dbell - request outbound doorbell message range
@@ -536,6 +534,7 @@ struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
 
 	return res;
 }
+EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
 
 /**
  * rio_release_outb_dbell - release outbound doorbell message range
@@ -553,6 +552,7 @@ int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
 
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
 
 /**
  * rio_add_mport_pw_handler - add port-write message handler into the list
@@ -567,22 +567,17 @@ int rio_add_mport_pw_handler(struct rio_mport *mport, void *context,
 			     int (*pwcback)(struct rio_mport *mport,
 			     void *context, union rio_pw_msg *msg, int step))
 {
-	int rc = 0;
-	struct rio_pwrite *pwrite;
+	struct rio_pwrite *pwrite = kzalloc(sizeof(*pwrite), GFP_KERNEL);
 
-	pwrite = kzalloc(sizeof(struct rio_pwrite), GFP_KERNEL);
-	if (!pwrite) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!pwrite)
+		return -ENOMEM;
 
 	pwrite->pwcback = pwcback;
 	pwrite->context = context;
 	mutex_lock(&mport->lock);
 	list_add_tail(&pwrite->node, &mport->pwrites);
 	mutex_unlock(&mport->lock);
-out:
-	return rc;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(rio_add_mport_pw_handler);
 
@@ -632,7 +627,7 @@ int rio_request_inb_pwrite(struct rio_dev *rdev,
 	int rc = 0;
 
 	spin_lock(&rio_global_list_lock);
-	if (rdev->pwcback != NULL)
+	if (rdev->pwcback)
 		rc = -ENOMEM;
 	else
 		rdev->pwcback = pwcback;
@@ -698,7 +693,7 @@ EXPORT_SYMBOL_GPL(rio_pw_enable);
 int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
 			u64 rbase, u32 size, u32 rflags)
 {
-	int rc = 0;
+	int rc;
 	unsigned long flags;
 
 	if (!mport->ops->map_inb)
@@ -742,7 +737,7 @@ EXPORT_SYMBOL_GPL(rio_unmap_inb_region);
 int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase,
 			u32 size, u32 rflags, dma_addr_t *local)
 {
-	int rc = 0;
+	int rc;
 	unsigned long flags;
 
 	if (!mport->ops->map_outb)
@@ -975,7 +970,7 @@ rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
 		rdev = rdev->prev;
 	}
 
-	if (prev == NULL)
+	if (!prev)
 		goto err_out;
 
 	p_port = prev->rswitch->route_table[rdev->destid];
@@ -1054,7 +1049,7 @@ rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
 		RIO_MNT_REQ_CMD_IS);
 
 	/* Exit if the response is not expected */
-	if (lnkresp == NULL)
+	if (!lnkresp)
 		return 0;
 
 	checkcount = 3;
@@ -1411,7 +1406,9 @@ rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
 						 ext_ftr_ptr, &ftr_header);
 		if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
 			return ext_ftr_ptr;
-		if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
+
+		ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header);
+		if (!ext_ftr_ptr)
 			break;
 	}
 
@@ -1462,6 +1459,7 @@ struct rio_dev *rio_get_asm(u16 vid, u16 did,
 	spin_unlock(&rio_global_list_lock);
 	return rdev;
 }
+EXPORT_SYMBOL_GPL(rio_get_asm);
 
 /**
  * rio_get_device - Begin or continue searching for a RIO device by vid/did
@@ -1481,6 +1479,7 @@ struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
 {
 	return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
 }
+EXPORT_SYMBOL_GPL(rio_get_device);
 
 /**
  * rio_std_route_add_entry - Add switch route table entry using standard
@@ -1696,7 +1695,7 @@ int rio_route_add_entry(struct rio_dev *rdev,
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->add_entry == NULL) {
+	if (!ops || !ops->add_entry) {
 		rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table,
 					     route_destid, route_port);
@@ -1749,7 +1748,7 @@ int rio_route_get_entry(struct rio_dev *rdev, u16 table,
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->get_entry == NULL) {
+	if (!ops || !ops->get_entry) {
 		rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table,
 					     route_destid, route_port);
@@ -1797,7 +1796,7 @@ int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock)
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->clr_table == NULL) {
+	if (!ops || !ops->clr_table) {
 		rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table);
 	} else if (try_module_get(ops->owner)) {
@@ -1889,7 +1888,7 @@ struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan,
 {
 	struct rio_dma_ext rio_ext;
 
-	if (dchan->device->device_prep_slave_sg == NULL) {
+	if (!dchan->device->device_prep_slave_sg) {
 		pr_err("%s: prep_rio_sg == NULL\n", __func__);
 		return NULL;
 	}
@@ -2189,7 +2188,6 @@ int rio_init_mports(void)
 
 	work = kcalloc(n, sizeof *work, GFP_KERNEL);
 	if (!work) {
-		pr_err("RIO: no memory for work struct\n");
 		destroy_workqueue(rio_wq);
 		goto no_disc;
 	}
@@ -2216,6 +2214,7 @@ int rio_init_mports(void)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_init_mports);
 
 static int rio_get_hdid(int index)
 {
@@ -2330,16 +2329,3 @@ int rio_unregister_mport(struct rio_mport *port)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rio_unregister_mport);
-
-EXPORT_SYMBOL_GPL(rio_local_get_device_id);
-EXPORT_SYMBOL_GPL(rio_get_device);
-EXPORT_SYMBOL_GPL(rio_get_asm);
-EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
-EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
-EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
-EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
-EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
-EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
-EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
-EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
-EXPORT_SYMBOL_GPL(rio_init_mports);

fs/binfmt_elf.c

@@ -1599,6 +1599,8 @@ static int fill_files_note(struct memelfnote *note)
 
 	/* *Estimated* file count and total data size needed */
 	count = current->mm->map_count;
+	if (count > UINT_MAX / 64)
+		return -EINVAL;
 	size = count * 64;
 
 	names_ofs = (2 + 3 * count) * sizeof(data[0]);