- 16 Jan, 2019 40 commits
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YueHaibing authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 025911a5 ] There is no need to have the '__be32 *p' variable static since new value always be assigned before use it. Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Cc: stable@vger.kernel.org Signed-off-by:
J. Bruce Fields <bfields@redhat.com> Signed-off-by:
Sasha Levin <sashal@kernel.org> Signed-off-by:
Juerg Haefliger <juergh@canonical.com> Signed-off-by:
Kleber Sacilotto de Souza <kleber.souza@canonical.com>
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Minchan Kim authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit fef912bf upstream. commit 98af4d4d upstream. I got a report from Howard Chen that he saw zram and sysfs race(ie, zram block device file is created but sysfs for it isn't yet) when he tried to create new zram devices via hotadd knob. v4.20 kernel fixes it by [1, 2] but it's too large size to merge into -stable so this patch fixes the problem by registering defualt group by Greg KH's approach[3]. This patch should be applied to every stable tree [3.16+] currently existing from kernel.org because the problem was introduced at 2.6.37 by [4]. [1] fef912bf, block: genhd: add 'groups' argument to device_add_disk [2] 98af4d4d, zram: register default groups with device_add_disk() [3] http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/ [4] 33863c21, Staging: zram: Replace ioctls with sysfs interface Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Hannes Reinecke <hare@suse.com> Tested-by:
Howard Chen <howardsoc@google.com> Signed-off-by:
Minchan Kim <minchan@kernel.org> Signed-off-by:
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Jeremy Linton authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 313a06e6 ] The lib/raid6/test fails to build the neon objects on arm64 because the correct machine type is 'aarch64'. Once this is correctly enabled, the neon recovery objects need to be added to the build. Reviewed-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
Jeremy Linton <jeremy.linton@arm.com> Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Geert Uytterhoeven authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit e3e61f01 ] If gcc decides not to inline make_sensor_label(): WARNING: vmlinux.o(.text+0x4df549c): Section mismatch in reference from the function .create_device_attrs() to the function .init.text:.make_sensor_label() The function .create_device_attrs() references the function __init .make_sensor_label(). This is often because .create_device_attrs lacks a __init annotation or the annotation of .make_sensor_label is wrong. As .probe() can be called after freeing of __init memory, all __init annotiations in the driver are bogus, and should be removed. Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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Taehee Yoo authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 54451f60 ] When IDLETIMER rule is added, sysfs file is created under /sys/class/xt_idletimer/timers/ But some label name shouldn't be used. ".", "..", "power", "uevent", "subsystem", etc... So that sysfs filename checking routine is needed. test commands: %iptables -I INPUT -j IDLETIMER --timeout 1 --label "power" splat looks like: [95765.423132] sysfs: cannot create duplicate filename '/devices/virtual/xt_idletimer/timers/power' [95765.433418] CPU: 0 PID: 8446 Comm: iptables Not tainted 4.19.0-rc6+ #20 [95765.449755] Call Trace: [95765.449755] dump_stack+0xc9/0x16b [95765.449755] ? show_regs_print_info+0x5/0x5 [95765.449755] sysfs_warn_dup+0x74/0x90 [95765.449755] sysfs_add_file_mode_ns+0x352/0x500 [95765.449755] sysfs_create_file_ns+0x179/0x270 [95765.449755] ? sysfs_add_file_mode_ns+0x500/0x500 [95765.449755] ? idletimer_tg_checkentry+0x3e5/0xb1b [xt_IDLETIMER] [95765.449755] ? rcu_read_lock_sched_held+0x114/0x130 [95765.449755] ? __kmalloc_track_caller+0x211/0x2b0 [95765.449755] ? memcpy+0x34/0x50 [95765.449755] idletimer_tg_checkentry+0x4e2/0xb1b [xt_IDLETIMER] [ ... ] Fixes: 0902b469 ("netfilter: xtables: idletimer target implementation") Signed-off-by:
Taehee Yoo <ap420073@gmail.com> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Jozsef Kadlecsik authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 17b8b74c ] The function is called when rcu_read_lock() is held and not when rcu_read_lock_bh() is held. Signed-off-by:
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by:
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Justin M. Forbes authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit a541f0eb ] Fixes: ERROR: "__node_distance" [drivers/nvme/host/nvme-core.ko] undefined! make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1 make: *** [Makefile:1275: modules] Error 2 + exit 1 Signed-off-by:
Justin M. Forbes <jforbes@fedoraproject.org> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Eric Westbrook authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 886503f3 ] Allow /0 as advertised for hash:net,port,net sets. For "hash:net,port,net", ipset(8) says that "either subnet is permitted to be a /0 should you wish to match port between all destinations." Make that statement true. Before: # ipset create cidrzero hash:net,port,net # ipset add cidrzero 0.0.0.0/0,12345,0.0.0.0/0 ipset v6.34: The value of the CIDR parameter of the IP address is invalid # ipset create cidrzero6 hash:net,port,net family inet6 # ipset add cidrzero6 ::/0,12345,::/0 ipset v6.34: The value of the CIDR parameter of the IP address is invalid After: # ipset create cidrzero hash:net,port,net # ipset add cidrzero 0.0.0.0/0,12345,0.0.0.0/0 # ipset test cidrzero 192.168.205.129,12345,172.16.205.129 192.168.205.129,tcp:12345,172.16.205.129 is in set cidrzero. # ipset create cidrzero6 hash:net,port,net family inet6 # ipset add cidrzero6 ::/0,12345,::/0 # ipset test cidrzero6 fe80::1,12345,ff00::1 fe80::1,tcp:12345,ff00::1 is in set cidrzero6. See also: https://bugzilla.kernel.org/show_bug.cgi?id=200897 https://github.com/ewestbrook/linux/commit/df7ff6efb0934ab6acc11f003ff1a7580d6c1d9cSigned-off-by:
Eric Westbrook <linux@westbrook.io> Signed-off-by:
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Vasily Gorbik authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit b44b136a ] According to Documentation/kbuild/makefiles.txt all build targets using if_changed should use FORCE as well. Add missing FORCE to make sure vdso targets are rebuild properly when not just immediate prerequisites have changed but also when build command differs. Reviewed-by:
Philipp Rudo <prudo@linux.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com> Signed-off-by:
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Nathan Chancellor authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit b5bb4258 ] Clang warns that if the default case is taken, ret will be uninitialized. ./arch/arm64/include/asm/percpu.h:196:2: warning: variable 'ret' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized] default: ^~~~~~~ ./arch/arm64/include/asm/percpu.h:200:9: note: uninitialized use occurs here return ret; ^~~ ./arch/arm64/include/asm/percpu.h:157:19: note: initialize the variable 'ret' to silence this warning unsigned long ret, loop; ^ = 0 This warning appears several times while building the erofs filesystem. While it's not strictly wrong, the BUILD_BUG will prevent this from becoming a true problem. Initialize ret to 0 in the default case right before the BUILD_BUG to silence all of these warnings. Reported-by:
Prasad Sodagudi <psodagud@codeaurora.org> Signed-off-by:
Nathan Chancellor <natechancellor@gmail.com> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
Dennis Zhou <dennis@kernel.org> Signed-off-by:
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Paul Gortmaker authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 684238d7 ] To fix: acerhdf: unknown (unsupported) BIOS version Gateway /LT31 /v1.3307 , please report, aborting! As can be seen in the context, the BIOS registers haven't changed in the previous versions, so the assumption is they won't have changed in this last update for this somewhat older platform either. Cc: Peter Feuerer <peter@piie.net> Cc: Darren Hart <dvhart@infradead.org> Cc: Andy Shevchenko <andy@infradead.org> Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by:
Peter Feuerer <peter@piie.net> Signed-off-by:
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Marek Szyprowski authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit b3322802 ] Ensure that clocks for core SoC modules (including TZPC0..9 modules) are enabled for suspend/resume cycle. This fixes suspend/resume support on Exynos5422-based Odroid XU3/XU4 boards. Suggested-by:
Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
Sylwester Nawrocki <snawrocki@kernel.org> Signed-off-by:
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Chengguang Xu authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 515f1867 ] There are some cases can cause memory leak when parsing option 'osdname'. Signed-off-by:
Chengguang Xu <cgxu519@gmx.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Richard Weinberger authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 7ff1e34b ] Fixes: arch/um/os-Linux/skas/process.c:613:1: warning: control reaches end of non-void function [-Wreturn-type] longjmp() never returns but gcc still warns that the end of the function can be reached. Add a return code and debug aid to detect this impossible case. Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Ernesto A. Fernández authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit 0a3021d4 ] Creating, renaming or deleting a file may cause catalog corruption and data loss. This bug is randomly triggered by xfstests generic/027, but here is a faster reproducer: truncate -s 50M fs.iso mkfs.hfsplus fs.iso mount fs.iso /mnt i=100 while [ $i -le 150 ]; do touch /mnt/$i &>/dev/null ((++i)) done i=100 while [ $i -le 150 ]; do mv /mnt/$i /mnt/$(perl -e "print $i x82") &>/dev/null ((++i)) done umount /mnt fsck.hfsplus -n fs.iso The bug is triggered whenever hfs_brec_update_parent() needs to split the root node. The height of the btree is not increased, which leaves the new node orphaned and its records lost. Link: http://lkml.kernel.org/r/26d882184fc43043a810114258f45277752186c7.1535682461.git.ernesto.mnd.fernandez@gmail.comSigned-off-by:
Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Ernesto A. Fernández authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit d057c036 ] This bug is triggered whenever hfs_brec_update_parent() needs to split the root node. The height of the btree is not increased, which leaves the new node orphaned and its records lost. It is not possible for this to happen on a valid hfs filesystem because the index nodes have fixed length keys. For reasons I ignore, the hfs module does have support for a number of hfsplus features. A corrupt btree header may report variable length keys and trigger this bug, so it's better to fix it. Link: http://lkml.kernel.org/r/9750b1415685c4adca10766895f6d5ef12babdb0.1535682463.git.ernesto.mnd.fernandez@gmail.comSigned-off-by:
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Jann Horn authored
BugLink: https://bugs.launchpad.net/bugs/1810958 [ Upstream commit b10298d5 ] fill_with_dentries() failed to propagate errors up to reiserfs_for_each_xattr() properly. Plumb them through. Note that reiserfs_for_each_xattr() is only used by reiserfs_delete_xattrs() and reiserfs_chown_xattrs(). The result of reiserfs_delete_xattrs() is discarded anyway, the only difference there is whether a warning is printed to dmesg. The result of reiserfs_chown_xattrs() does matter because it can block chowning of the file to which the xattrs belong; but either way, the resulting state can have misaligned ownership, so my patch doesn't improve things greatly. Credit for making me look at this code goes to Al Viro, who pointed out that the ->actor calling convention is suboptimal and should be changed. Link: http://lkml.kernel.org/r/20180802163335.83312-1-jannh@google.comSigned-off-by:
Jann Horn <jannh@google.com> Reviewed-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 9e8730b1 upstream. With the following commit: 8f918697 ("x86/build: Fix stack alignment for CLang") cc-option is only used to determine the name of the stack alignment option supported by the compiler, but not to verify that the actual parameter <option>=N is valid in combination with the other CFLAGS. This causes problems (as reported by the kbuild robot) with older GCC versions which only support stack alignment on a boundary of 16 bytes or higher. Also use (__)cc_option to add the stack alignment option to CFLAGS to make sure only valid options are added. Reported-by:
kbuild test robot <fengguang.wu@intel.com> Signed-off-by:
Matthias Kaehlcke <mka@chromium.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bernhard.Rosenkranzer@linaro.org Cc: Greg Hackmann <ghackmann@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michael Davidson <md@google.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Hines <srhines@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dianders@chromium.org Fixes: 8f918697 ("x86/build: Fix stack alignment for CLang") Link: http://lkml.kernel.org/r/20170817182047.176752-1-mka@chromium.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 8f918697 upstream. Commit: d77698df ("x86/build: Specify stack alignment for clang") intended to use the same stack alignment for clang as with gcc. The two compilers use different options to configure the stack alignment (gcc: -mpreferred-stack-boundary=n, clang: -mstack-alignment=n). The above commit assumes that the clang option uses the same parameter type as gcc, i.e. that the alignment is specified as 2^n. However clang interprets the value of this option literally to use an alignment of n, in consequence the stack remains misaligned. Change the values used with -mstack-alignment to be the actual alignment instead of a power of two. cc-option isn't used here with the typical pattern of KBUILD_CFLAGS += $(call cc-option ...). The reason is that older gcc versions don't support the -mpreferred-stack-boundary option, since cc-option doesn't verify whether the alternative option is valid it would incorrectly select the clang option -mstack-alignment.. Signed-off-by:
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Michael Davidson authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 18d5e6c3 upstream. undef memcpy() and friends in boot/string.c so that the functions defined here will have the correct names, otherwise we end up up trying to redefine __builtin_memcpy() etc. Surprisingly, GCC allows this (and, helpfully, discards the __builtin_ prefix from the function name when compiling it), but clang does not. Adding these #undef's appears to preserve what I assume was the original intent of the code. Signed-off-by:
Michael Davidson <md@google.com> Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bernhard.Rosenkranzer@linaro.org Cc: Greg Hackmann <ghackmann@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170724235155.79255-1-mka@chromium.orgSigned-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit d77698df upstream. For gcc stack alignment is configured with -mpreferred-stack-boundary=N, clang has the option -mstack-alignment=N for that purpose. Use the same alignment as with gcc. If the alignment is not specified clang assumes an alignment of 16 bytes, as required by the standard ABI. However as mentioned in d9b0cde9 ("x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported") the standard kernel entry on x86-64 leaves the stack on an 8-byte boundary, as a consequence clang will keep the stack misaligned. Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 032a2c4f upstream. cc-option is used to enable compiler options for the boot code if they are available. The macro uses KBUILD_CFLAGS and KBUILD_CPPFLAGS for the check, however these flags aren't used to build the boot code, in consequence cc-option can yield wrong results. For example -mpreferred-stack-boundary=2 is never set with a 64-bit compiler, since the setting is only valid for 16 and 32-bit binaries. This is also the case for 32-bit kernel builds, because the option -m32 is added to KBUILD_CFLAGS after the assignment of REALMODE_CFLAGS. Use __cc-option instead of cc-option for the boot mode options. The macro receives the compiler options as parameter instead of using KBUILD_C*FLAGS, for the boot code we pass REALMODE_CFLAGS. Also use separate statements for the __cc-option checks instead of performing them in the initial assignment of REALMODE_CFLAGS since the variable is an input of the macro. Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 9f3f1fd2 upstream. cc-option uses KBUILD_CFLAGS and KBUILD_CPPFLAGS when it determines whether an option is supported or not. This is fine for options used to build the kernel itself, however some components like the x86 boot code use a different set of flags. Add the new macro __cc-option which is a more generic version of cc-option with additional parameters. One parameter is the compiler with which the check should be performed, the other the compiler options to be used instead KBUILD_C*FLAGS. Refactor cc-option and hostcc-option to use __cc-option and move hostcc-option to scripts/Kbuild.include. Suggested-by:
Arnd Bergmann <arnd@arndb.de> Suggested-by:
Michal Marek <mmarek@suse.com> Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 121843eb upstream. The constraint "rm" allows the compiler to put mix_const into memory. When the input operand is a memory location then MUL needs an operand size suffix, since Clang can't infer the multiplication width from the operand. Add and use the _ASM_MUL macro which determines the operand size and resolves to the NUL instruction with the corresponding suffix. This fixes the following error when building with clang: CC arch/x86/lib/kaslr.o /tmp/kaslr-dfe1ad.s: Assembler messages: /tmp/kaslr-dfe1ad.s:182: Error: no instruction mnemonic suffix given and no register operands; can't size instruction Signed-off-by:
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Michael Davidson authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit fdb2726f upstream. aes_ctrby8_avx-x86_64.S uses the C preprocessor for token pasting of character sequences that are not valid preprocessor tokens. While this is allowed when preprocessing assembler files it exposes an incompatibilty between the clang and gcc preprocessors where clang does not strip leading white space from macro parameters, leading to the CONCAT(%xmm, i) macro expansion on line 96 resulting in a token with a space character embedded in it. While this could be resolved by deleting the offending space character, the assembler is perfectly capable of doing the token pasting correctly for itself so we can just get rid of the preprocessor macros. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 2c4fd1ac upstream. clang currently does not support these optimizations, only enable them when they are available. Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 clang raises 'asm-operand-widths' warnings in inline assembly code when the size of an operand is < 64 bits and the operand width is unspecified. Most warnings are raised in macros, i.e. the datatype of the operand may vary. Signed-off-by:
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Stefan Agner authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit ef8c4ed9 upstream. When using a GCC cross toolchain which is not in a compiled in Clang search path, Clang reverts to the system assembler and linker. This leads to assembler or linker errors, depending on which tool is first used for a given architecture. It seems that Clang is not searching $PATH for a matching assembler or linker. Make sure that Clang picks up the correct assembler or linker by passing the cross compilers bin directory as search path. This allows to use Clang provided by distributions with GCC toolchains not in /usr/bin. Link: https://github.com/ClangBuiltLinux/linux/issues/78Signed-off-by:
Stefan Agner <stefan@agner.ch> Reviewed-and-tested-by:
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Stefan Agner authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 0f0e8de3 upstream. In order to make sure compiler flag detection for ARM works correctly the no-integrated-as flags need to be set before including the arch specific Makefile. Fixes: cfe17c9b ("kbuild: move cc-option and cc-disable-warning after incl. arch Makefile") Signed-off-by:
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Sodagudi Prasad authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 0a5f4176 upstream. Currently, GCC disables -Wunused-const-variable, but not -Wunused-variable, so warns unused variables if they are non-constant. While, Clang does not warn unused variables at all regardless of the const qualifier because -Wno-unused-const-variable is implied by the stronger option -Wno-unused-variable. Disable -Wunused-const-variable instead of -Wunused-variable so that GCC and Clang work in the same way. Signed-off-by:
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Nick Desaulniers authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit df16aaac upstream. When compiling with `make CC=clang HOSTCC=clang`, I was seeing warnings that clang did not recognize -fno-delete-null-pointer-checks for HOSTCC targets. These were added in commit 61163efa ("kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang"). Clang does not support -fno-delete-null-pointer-checks, so adding it to HOSTCFLAGS if HOSTCC is clang does not make sense. It's not clear why the other warnings were disabled, and just for HOSTCFLAGS, but I can remove them, add -Werror to HOSTCFLAGS and compile with clang just fine. Suggested-by:
Nick Desaulniers <nick.desaulniers@gmail.com> Signed-off-by:
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David Lin authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit bb3f38c3 upstream. We should avoid using the space character when passing arguments to clang, because static code analysis check tool such as sparse may misinterpret the arguments followed by spaces as build targets hence cause the build to fail. Signed-off-by:
David Lin <dtwlin@google.com> Signed-off-by:
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Masahiro Yamada authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit cfe17c9b upstream. Geert reported commit ae6b289a ("kbuild: Set KBUILD_CFLAGS before incl. arch Makefile") broke cross-compilation using a cross-compiler that supports less compiler options than the host compiler. For example, cc1: error: unrecognized command line option "-Wno-unused-but-set-variable" This problem happens on architectures that setup CROSS_COMPILE in their arch/*/Makefile. Move the cc-option and cc-disable-warning back to the original position, but keep the Clang target options untouched. Fixes: ae6b289a ("kbuild: Set KBUILD_CFLAGS before incl. arch Makefile") Reported-by:
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Chris Fries authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit ae6b289a upstream. Set the clang KBUILD_CFLAGS up before including arch/ Makefiles, so that ld-options (etc.) can work correctly. This fixes errors with clang such as ld-options trying to CC against your host architecture, but LD trying to link against your target architecture. Signed-off-by:
Chris Fries <cfries@google.com> Signed-off-by:
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Nick Desaulniers authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 86a9df59 upstream. I was not seeing my linker flags getting added when using ld-option when cross compiling with Clang. Upon investigation, this seems to be due to a difference in how GCC vs Clang handle cross compilation. GCC is configured at build time to support one backend, that is implicit when compiling. Clang is explicit via the use of `-target <triple>` and ships with all supported backends by default. GNU Make feature test macros that compile then link will always fail when cross compiling with Clang unless Clang's triple is passed along to the compiler. For example: $ clang -x c /dev/null -c -o temp.o $ aarch64-linux-android/bin/ld -E temp.o aarch64-linux-android/bin/ld: unknown architecture of input file `temp.o' is incompatible with aarch64 output aarch64-linux-android/bin/ld: warning: cannot find entry symbol _start; defaulting to 0000000000400078 $ echo $? 1 $ clang -target aarch64-linux-android- -x c /dev/null -c -o temp.o $ aarch64-linux-android/bin/ld -E temp.o aarch64-linux-android/bin/ld: warning: cannot find entry symbol _start; defaulting to 00000000004002e4 $ echo $? 0 This causes conditional checks that invoke $(CC) without the target triple, then $(LD) on the result, to always fail. Suggested-by:
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Ard Biesheuvel authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 91ee5b21 upstream. Clang may emit absolute symbol references when building in non-PIC mode, even when using the default 'small' code model, which is already mostly position independent to begin with, due to its use of adrp/add pairs that have a relative range of +/- 4 GB. The remedy is to pass the -fpie flag, which can be done safely now that the code has been updated to avoid GOT indirections (which may be emitted due to the compiler assuming that the PIC/PIE code may end up in a shared library that is subject to ELF symbol preemption) Passing -fpie when building code that needs to execute at an a priori unknown offset is arguably an improvement in any case, and given that the recent visibility changes allow the PIC build to pass with GCC as well, let's add -fpie for all arm64 builds rather than only for Clang. Tested-by:
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Ard Biesheuvel authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 0426a4e6 upstream. To prevent the compiler from emitting absolute references to the section markers when running in PIC mode, override the visibility to 'hidden' for all contents of asm/sections.h Tested-by:
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Ard Biesheuvel authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit f4857f4c upstream. Replace the inline asm which exports struct offsets as ELF symbols with proper const variables exposing the same values. This works around an issue with Clang which does not interpret the "i" (or "I") constraints in the same way as GCC. Signed-off-by:
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Matthias Kaehlcke authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit bfb38988 upstream. clang generates plenty of these warnings in different parts of the code, to an extent that the warnings are little more than noise. Disable the 'address-of-packed-member' warning. Signed-off-by:
Douglas Anderson <dianders@chromium.org> Signed-off-by:
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Arnd Bergmann authored
BugLink: https://bugs.launchpad.net/bugs/1810958 commit 1f318a8b upstream. clang warns about unused inline functions by default: arch/arm/crypto/aes-cipher-glue.c:68:1: warning: unused function '__inittest' [-Wunused-function] arch/arm/crypto/aes-cipher-glue.c:69:1: warning: unused function '__exittest' [-Wunused-function] As these appear in every single module, let's just disable the warnings by marking the two functions as __maybe_unused. Signed-off-by:
Miroslav Benes <mbenes@suse.cz> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Jessica Yu <jeyu@redhat.com> Signed-off-by:
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