- 26 Sep, 2012 40 commits
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Heiko Carstens authored
Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
We can have either shared kernel or jump label support, but not both. If a kernel gets IPL'ed from an NSS it's not possible to patch the text segment, since it's read-only. Therefore any static branches cannot be updated. So we need to make sure that shared kernel support is disabled if jump label support is enabled. Signed-off-by:
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Heiko Carstens authored
Fix typo: risblk -> risblg. Signed-off-by:
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Heiko Carstens authored
Add support for new BPF_S_ANC_ALU_XOR_X instruction which got added with ffe06c17 "filter: add XOR operation". s390 version of 4bfaddf1 "x86 bpf_jit: support BPF_S_ANC_ALU_XOR_X instruction". Signed-off-by:
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Heiko Carstens authored
Same as 0fa0e2f0 "x86: Move call to print_modules() out of show_regs()". Signed-off-by:
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Heiko Carstens authored
Same as 0d26d1d8 "x86/mm: Mark free_initrd_mem() as __init". In addition also add the __init annotation to setup_zero_pages(). Signed-off-by:
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Stefan Haberland authored
A common way to prepare a z/VM mini disk is to format the real device with a z/VM tool like CPFMTXA and then define a mini disk that excludes the first cylinder, i.e. the cylinder 0 of the virtual disk is located at cylinder 1 of the real device. The DASD device driver will recognize such a mini disk as formatted, as the uniform record layout on the disk matches that of an LDL formatted device. However, the cylinder value in the 'count' field of the ECKD records matches the geometry of the real device, and not that of the mini disk, so I/O requests will fail with 'record not found' errors. To make the mini disk usable, it needs to be formatted with a tool like dasdfmt. To enable tools like distribution installation tools to recognize this situation, the DASD device driver should report such a mini disk as 'not formatted'. To this end we need to extend the device recognition code to check not just for proper record sizes, but also for proper cylinder/head/record values. Signed-off-by:
Stefan Haberland <stefan.haberland@de.ibm.com> Reviewed-by:
Stefan Weinhuber <wein@de.ibm.com> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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Heiko Carstens authored
The generic variant has a local_irq_save/restore pair which is quite expensive. It is sufficient to disable preemption, which is a no-op with !CONFIG_PREEMPT and then use the regular xchg macro. Signed-off-by:
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Heiko Carstens authored
Since "Kconfig: split the s390 base menu" CONFIG_KEXEC gets always selected. Therefore there is no point in keeping CONFIG_KEXEC anywhere. Signed-off-by:
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Heiko Carstens authored
Use designated initializers for the irq class array in irq.c so it's always guaranteed that the order of elements is equal to their corresponding parts in irq.h. Signed-off-by:
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Heiko Carstens authored
Get rid of these: arch/s390/kernel/smp.c:134:19: warning: ‘status’ may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/pgtable.c:641:10: warning: ‘table’ may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/pgtable.c:644:12: warning: ‘page’ may be used uninitialized in this function [-Wuninitialized] drivers/s390/cio/cio.c:1037:14: warning: ‘schid’ may be used uninitialized in this function [-Wuninitialized] Signed-off-by:
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Heiko Carstens authored
Move fill_cpu_elf_notes() prototype to header file. This way we get compile errors if e.g. the number of function parameters get changed. Otherwise it's possible to change just the definition and everything else still compiles fine, but the result is broken code. Signed-off-by:
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Heiko Carstens authored
Add appropriate header file: arch/s390/kernel/process.c:327:15: warning: symbol 'arch_align_stack' was not declared. Signed-off-by:
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Heiko Carstens authored
if (MACHINE_HAS_TE) translates to if (0) on !CONFIG_64BIT however the compiler still warns about invalid shifts within non-reachable code. So add an explicit ifdef to get rid of this warning: arch/s390/kernel/ptrace.c: In function ‘update_per_regs’: arch/s390/kernel/ptrace.c:63:4: warning: left shift count >= width of type [enabled by default] arch/s390/kernel/ptrace.c:65:4: warning: left shift count >= width of type [enabled by default] Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
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Heiko Carstens authored
The early kernel decrompressing code can't call into the kernel in order to profile branches. Fixes this link error: arch/s390/boot/compressed/misc.o: In function `decompress_kernel': misc.c:(.text+0x9a6): undefined reference to `ftrace_likely_update' Signed-off-by:
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Heiko Carstens authored
The whole hardware support is only available in zArch mode. Fixes also this compile warning: arch/s390/kernel/perf_cpum_cf.c: In function ‘cpumf_pmu_init’: arch/s390/kernel/perf_cpum_cf.c:670:2: warning: left shift count >= width of type [enabled by default] Signed-off-by:
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Heiko Carstens authored
Fix this compile error: In file included from drivers/s390/char/tape_core.c:29:0: drivers/s390/char/tape_std.h:103:66: warning: ‘struct request’ declared inside parameter list [enabled by default] Signed-off-by:
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Heiko Carstens authored
Get rid of this compile warning for CONFIG_32BIT: drivers/s390/crypto/ap_bus.c:168:12: warning: ‘ap_configuration_available’ defined but not used [-Wunused-function] Signed-off-by:
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Wei Yongjun authored
Use for_each_set_bit() to simplify the code. spatch with a semantic match is used to found this. (http://coccinelle.lip6.fr/) Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
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Jan Glauber authored
Calling debug_event the s390 debug feature only logs up to buf_size bytes of the debug view. If debug_event is called with more bytes than buf_size the additional data is ignored and not logged in the debug view. Use multiple calls to debug_event if the length exceeds buf_size. Signed-off-by:
Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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Holger Dengler authored
Detect external AP bus configuration changes and request an AP device rescan. Signed-off-by:
Holger Dengler <hd@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Changing the return value of vmlogrdr_open() to -EOPNOTSUPP if O_NONBLOCK is specified shouldn't have any negative side effects. Any existing user wouldn't specify that flag since it wouldn't work anyway. Signed-off-by:
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Heiko Carstens authored
Change return value of appldata_asm() to -EOPNOTSUPP in case of an error. The return value was only used internally and not passed to user space. Signed-off-by:
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Heiko Carstens authored
Returning -ENOSYS on kexec_load() is a bad idea since user space cannot tell if the system call is not implmented or if it failed. Use -EOPNOTSUPP in case somebody tries a kexec_load on a NSS image based kernel instead. Signed-off-by:
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Heiko Carstens authored
Change -ENOSYS to -EOPNOTSUPP. Return value is used only internally. Signed-off-by:
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Heiko Carstens authored
The return value was only internally used, so it's ok to change. Signed-off-by:
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Heiko Carstens authored
For non-existent ioctls -ENOTTY should be returned. Signed-off-by:
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Heiko Carstens authored
Change return code handling of the stsi() function: In case function code 0 was specified the return value is the current configuration level (already shifted). That way all the code that actually copied the stsi_0() function can go away. Otherwise the return value is 0 (success) or negative to indicate an error (currently only -EOPNOTSUPP). Also stsi() is no longer an inline function. The function is not performance critical, but every caller would generate an exception table entry for this function. Signed-off-by:
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Jean Delvare authored
I was checking why this spinlock was never initialized, but it turns out it's not used anywhere, so we can drop it. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
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Heiko Carstens authored
This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by:
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Sebastian Ott authored
Do not reset drvdata before the block device is cleaned up. With a non-empty block queue drvdata could be accessed. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Sebastian Ott authored
Remove the spinlock from struct scm_device. drvdata and attributes are guarded via device_lock. Signed-off-by:
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Heiko Carstens authored
The cpu polarization member is the only per cpu state that is not part of the pcpu structure. So add it there and have everything in one place. Signed-off-by:
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Heiko Carstens authored
The maximum nesting of the cpu topology is evaluated when /proc/sysinfo is the first time read. This happens without a lock and a concurrent reader on a different cpu can see and use an invalid intermediate value. Besides the fact that this race is quite unlikely the worst thing that could happen is that /proc/sysinfo would contain bogus information about the machine's cpu topology. Nevertheless this should be fixed. So move the detection code to the early machine detection code and since now the value is early available use it in the topology code as well. Signed-off-by:
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Gerald Schaefer authored
This patch introduces the __get_user_pages_fast() function on s390, which will be needed with CONFIG_TRANSPARENT_HUGEPAGE and futex. Signed-off-by:
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Heiko Carstens authored
Add a couple of missing fields that were introduced with z196. Signed-off-by:
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