- 07 5月, 2015 1 次提交
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由 Ard Biesheuvel 提交于
The arm64 CRC32 (not CRC32c) implementation was not quite doing the same thing as the generic one. Fix that. Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: NSteve Capper <steve.capper@linaro.org> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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- 04 5月, 2015 2 次提交
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由 Álvaro Fernández Rojas 提交于
- s/clk_didsable_unprepare/clk_disable_unprepare - s/prov/priv - s/error/ret (bcm63xx_rng_probe) Fixes: 6229c160 ("hwrng: bcm63xx - make use of devm_hwrng_register") Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com> Acked-by: NFlorian Fainelli <f.fainelli@gmail.com> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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由 Daniel Borkmann 提交于
In commit 0b053c95 ("lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR"), we made memzero_explicit() more robust in case LTO would decide to inline memzero_explicit() and eventually find out it could be elimiated as dead store. While using barrier() works well for the case of gcc, recent efforts from LLVMLinux people suggest to use llvm as an alternative to gcc, and there, Stephan found in a simple stand-alone user space example that llvm could nevertheless optimize and thus elimitate the memset(). A similar issue has been observed in the referenced llvm bug report, which is regarded as not-a-bug. Based on some experiments, icc is a bit special on its own, while it doesn't seem to eliminate the memset(), it could do so with an own implementation, and then result in similar findings as with llvm. The fix in this patch now works for all three compilers (also tested with more aggressive optimization levels). Arguably, in the current kernel tree it's more of a theoretical issue, but imho, it's better to be pedantic about it. It's clearly visible with gcc/llvm though, with the below code: if we would have used barrier() only here, llvm would have omitted clearing, not so with barrier_data() variant: static inline void memzero_explicit(void *s, size_t count) { memset(s, 0, count); barrier_data(s); } int main(void) { char buff[20]; memzero_explicit(buff, sizeof(buff)); return 0; } $ gcc -O2 test.c $ gdb a.out (gdb) disassemble main Dump of assembler code for function main: 0x0000000000400400 <+0>: lea -0x28(%rsp),%rax 0x0000000000400405 <+5>: movq $0x0,-0x28(%rsp) 0x000000000040040e <+14>: movq $0x0,-0x20(%rsp) 0x0000000000400417 <+23>: movl $0x0,-0x18(%rsp) 0x000000000040041f <+31>: xor %eax,%eax 0x0000000000400421 <+33>: retq End of assembler dump. $ clang -O2 test.c $ gdb a.out (gdb) disassemble main Dump of assembler code for function main: 0x00000000004004f0 <+0>: xorps %xmm0,%xmm0 0x00000000004004f3 <+3>: movaps %xmm0,-0x18(%rsp) 0x00000000004004f8 <+8>: movl $0x0,-0x8(%rsp) 0x0000000000400500 <+16>: lea -0x18(%rsp),%rax 0x0000000000400505 <+21>: xor %eax,%eax 0x0000000000400507 <+23>: retq End of assembler dump. As gcc, clang, but also icc defines __GNUC__, it's sufficient to define this in compiler-gcc.h only to be picked up. For a fallback or otherwise unsupported compiler, we define it as a barrier. Similarly, for ecc which does not support gcc inline asm. Reference: https://llvm.org/bugs/show_bug.cgi?id=15495Reported-by: NStephan Mueller <smueller@chronox.de> Tested-by: NStephan Mueller <smueller@chronox.de> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Stephan Mueller <smueller@chronox.de> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: mancha security <mancha1@zoho.com> Cc: Mark Charlebois <charlebm@gmail.com> Cc: Behan Webster <behanw@converseincode.com> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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- 24 4月, 2015 2 次提交
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由 Geert Uytterhoeven 提交于
If NO_DMA=y: drivers/built-in.o: In function `img_hash_write_via_dma_stop': img-hash.c:(.text+0xa2b822): undefined reference to `dma_unmap_sg' drivers/built-in.o: In function `img_hash_xmit_dma': img-hash.c:(.text+0xa2b8d8): undefined reference to `dma_map_sg' img-hash.c:(.text+0xa2b948): undefined reference to `dma_unmap_sg' Also move the "depends" section below the "tristate" line while we're at it. Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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由 Ard Biesheuvel 提交于
Patch e68410eb ("crypto: x86/sha512_ssse3 - move SHA-384/512 SSSE3 implementation to base layer") changed the prototypes of the core asm SHA-512 implementations so that they are compatible with the prototype used by the base layer. However, in one instance, the register that was used for passing the input buffer was reused as a scratch register later on in the code, and since the input buffer param changed places with the digest param -which needs to be written back before the function returns- this resulted in the scratch register to be dereferenced in a memory write operation, causing a GPF. Fix this by changing the scratch register to use the same register as the input buffer param again. Fixes: e68410eb ("crypto: x86/sha512_ssse3 - move SHA-384/512 SSSE3 implementation to base layer") Reported-By: NBobby Powers <bobbypowers@gmail.com> Tested-By: NBobby Powers <bobbypowers@gmail.com> Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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- 16 4月, 2015 35 次提交
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由 Herbert Xu 提交于
Commit 9c521a20 ("crypto: api - remove instance when test failed") tried to grab a module reference count before the module was even set. Worse, it then goes on to free the module reference count after it is set so you quickly end up with a negative module reference count which prevents people from using any instances belonging to that module. This patch moves the module initialisation before the reference count. Reported-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Linus Torvalds 提交于
Merge second patchbomb from Andrew Morton: - the rest of MM - various misc bits - add ability to run /sbin/reboot at reboot time - printk/vsprintf changes - fiddle with seq_printf() return value * akpm: (114 commits) parisc: remove use of seq_printf return value lru_cache: remove use of seq_printf return value tracing: remove use of seq_printf return value cgroup: remove use of seq_printf return value proc: remove use of seq_printf return value s390: remove use of seq_printf return value cris fasttimer: remove use of seq_printf return value cris: remove use of seq_printf return value openrisc: remove use of seq_printf return value ARM: plat-pxa: remove use of seq_printf return value nios2: cpuinfo: remove use of seq_printf return value microblaze: mb: remove use of seq_printf return value ipc: remove use of seq_printf return value rtc: remove use of seq_printf return value power: wakeup: remove use of seq_printf return value x86: mtrr: if: remove use of seq_printf return value linux/bitmap.h: improve BITMAP_{LAST,FIRST}_WORD_MASK MAINTAINERS: CREDITS: remove Stefano Brivio from B43 .mailmap: add Ricardo Ribalda CREDITS: add Ricardo Ribalda Delgado ...
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Miscellanea: o Remove unused return value from trace_lookup_stack Signed-off-by: NJoe Perches <joe@perches.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Acked-by: NTejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Acked-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Miscellanea: o Coalesce formats, realign arguments Signed-off-by: NJoe Perches <joe@perches.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Acked-by: NJesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: Jonas Bonn <jonas@southpole.se> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, (as it is here, it doesn't return # of chars emitted) will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: Ley Foon Tan <lftan@altera.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Acked-by: NMichal Simek <monstr@monstr.eu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <len.brown@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: NJoe Perches <joe@perches.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
The macro BITMAP_LAST_WORD_MASK can be implemented without a conditional, which will generally lead to slightly better generated code (221 bytes saved for allmodconfig-GCOV_KERNEL, ~2k with GCOV_KERNEL). As a small bonus, this also ensures that the nbits parameter is expanded exactly once. In BITMAP_FIRST_WORD_MASK, if start is signed gcc is technically allowed to assume it is positive (or divisible by BITS_PER_LONG), and hence just do the simple mask. It doesn't seem to use this, and even on an architecture like x86 where the shift only depends on the lower 5 or 6 bits, and these bits are not affected by the signedness of the expression, gcc still generates code to compute the C99 mandated value of start % BITS_PER_LONG. So just use a mask explicitly, also for consistency with BITMAP_LAST_WORD_MASK. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Tejun Heo <tj@kernel.org> Reviewed-by: NGeorge Spelvin <linux@horizon.com> Cc: Yury Norov <yury.norov@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
This email address isn't working anymore Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Ricardo Ribalda Delgado 提交于
Work and Home computer had different settings in the mail client. Some contributions appear as Ricardo Ribalda, others as Ricardo Ribalda Delgado (and one as just Ricardo). Signed-off-by: NRicardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Ricardo Ribalda Delgado 提交于
Add personal details to CREDITS file. Signed-off-by: NRicardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
Consistently use a single tab after the "specifier:" type. Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
The current semantics of string_escape_mem are inadequate for one of its current users, vsnprintf(). If that is to honour its contract, it must know how much space would be needed for the entire escaped buffer, and string_escape_mem provides no way of obtaining that (short of allocating a large enough buffer (~4 times input string) to let it play with, and that's definitely a big no-no inside vsnprintf). So change the semantics for string_escape_mem to be more snprintf-like: Return the size of the output that would be generated if the destination buffer was big enough, but of course still only write to the part of dst it is allowed to, and (contrary to snprintf) don't do '\0'-termination. It is then up to the caller to detect whether output was truncated and to append a '\0' if desired. Also, we must output partial escape sequences, otherwise a call such as snprintf(buf, 3, "%1pE", "\123") would cause printf to write a \0 to buf[2] but leaving buf[0] and buf[1] with whatever they previously contained. This also fixes a bug in the escaped_string() helper function, which used to unconditionally pass a length of "end-buf" to string_escape_mem(); since the latter doesn't check osz for being insanely large, it would happily write to dst. For example, kasprintf(GFP_KERNEL, "something and then %pE", ...); is an easy way to trigger an oops. In test-string_helpers.c, the -ENOMEM test is replaced with testing for getting the expected return value even if the buffer is too small. We also ensure that nothing is written (by relying on a NULL pointer deref) if the output size is 0 by passing NULL - this has to work for kasprintf("%pE") to work. In net/sunrpc/cache.c, I think qword_add still has the same semantics. Someone should definitely double-check this. In fs/proc/array.c, I made the minimum possible change, but longer-term it should stop poking around in seq_file internals. [andriy.shevchenko@linux.intel.com: simplify qword_add] [andriy.shevchenko@linux.intel.com: add missed curly braces] Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
When printf is given the format specifier %pE, it needs a way of obtaining the total output size that would be generated if the buffer was large enough, and string_escape_mem doesn't easily provide that. This is a refactorization of string_escape_mem in preparation of changing its external API to provide that information. The somewhat ugly early returns and subsequent seemingly redundant conditionals are to make the following patch touch as little as possible in string_helpers.c while still preserving the current behaviour of never outputting partial escape sequences. That behaviour must also change for %pE to work as one expects from every other printf specifier. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
The helper hex_string() is broken in two ways. First, it doesn't increment buf regardless of whether there is room to print, so callers such as kasprintf() that try to probe the correct storage to allocate will get a too small return value. But even worse, kasprintf() (and likely anyone else trying to find the size of the result) pass NULL for buf and 0 for size, so we also have end == NULL. But this means that the end-1 in hex_string() is (char*)-1, so buf < end-1 is true and we get a NULL pointer deref. I double-checked this with a trivial kernel module that just did a kasprintf(GFP_KERNEL, "%14ph", "CrashBoomBang"). Nobody seems to be using %ph with kasprintf, but we might as well fix it before it hits someone. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Geert Uytterhoeven 提交于
Add format specifiers for printing struct clk: - '%pC' or '%pCn': name (Common Clock Framework) or address (legacy clock framework) of the clock, - '%pCr': rate of the clock. [akpm@linux-foundation.org: omit code if !CONFIG_HAVE_CLK] Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Geert Uytterhoeven 提交于
Move the format types for 64-bit integers and configurable size integers to the top, so they're next to the other integer format types. While at it, add the missing format types for s32 and u32. Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Geert Uytterhoeven 提交于
This patch series improves the documentation for printk() formats, and adds support for printing clocks. The latter has always been a hassle if you wanted to support both the common and legacy clock frameworks. - '%pC' and '%pCn' print the name (Common Clock Framework) or address (legacy clock framework) of a clock, - '%pCr' prints the current clock rate. This patch (of 3): Make sure all %p extensions that take parameters by references are documented to do so. Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
Making ZEROPAD == '0'-' ', we can eliminate a few more instructions. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
gcc doesn't merge or overlap const char[] objects with identical contents (probably language lawyers would also insist that these things have different addresses), but there's no reason to have the string "0123456789ABCDEF" occur in multiple places. hex_asc_upper is declared in kernel.h and defined in lib/hexdump.c, which is unconditionally compiled in. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
At least since the initial git commit, when base was passed as a separate parameter, number() has only been called with bases 8, 10 and 16. I'm guessing that 66 was to accommodate 64 0/1, a sign and a '\0', but the buffer is only used for the actual digits. Octal digits carry 3 bits of information, so 24 is enough. Spell that 3*sizeof(num) so one less place needs to be changed should long long ever be 128 bits. Also remove the commented-out code that would handle an arbitrary base. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rasmus Villemoes 提交于
Since FORMAT_TYPE_INT is simply 1 more than FORMAT_TYPE_UINT, and similarly for BYTE/UBYTE, SHORT/USHORT, LONG/ULONG, we can eliminate a few instructions by making SIGN have the value 1 instead of 2, and then use arithmetic instead of branches for computing the right spec->type. It's a little hacky, but certainly in the same spirit as SMALL needing to have the value 0x20. For example for the spec->qualifier == 'l' case, gcc now generates 75e: 0f b6 53 01 movzbl 0x1(%rbx),%edx 762: 83 e2 01 and $0x1,%edx 765: 83 c2 09 add $0x9,%edx 768: 88 13 mov %dl,(%rbx) instead of 763: 0f b6 53 01 movzbl 0x1(%rbx),%edx 767: 83 e2 02 and $0x2,%edx 76a: 80 fa 01 cmp $0x1,%dl 76d: 19 d2 sbb %edx,%edx 76f: 83 c2 0a add $0xa,%edx 772: 88 13 mov %dl,(%rbx) Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Steven Rostedt 提交于
KERN_CONT is nicely commented in kern_levels.h, but pr_cont() is now used more often, and it lacks the comment stating what it is used for. It can be confused as continuing the log level, but that is not its purpose. Its purpose is to continue a line that had no newline enclosed. This should be documented by pr_cont() as well. Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Acked-by: NBorislav Petkov <bp@suse.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joel Stanley 提交于
Use orderly_reboot so userspace will to shut itself down via the reboot path. This is required for graceful reboot initiated by the BMC, such as when a user uses ipmitool to issue a 'chassis power cycle' command. Signed-off-by: NJoel Stanley <joel@jms.id.au> Acked-by: NMichael Ellerman <mpe@ellerman.id.au> Cc: Fabian Frederick <fabf@skynet.be> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Kerr <jk@ozlabs.org> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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