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* sched, x86: Optimize the preempt_schedule() callPeter Zijlstra2013-09-251-0/+50
| | | | | | | | | | | | | | Remove the bloat of the C calling convention out of the preempt_enable() sites by creating an ASM wrapper which allows us to do an asm("call ___preempt_schedule") instead. calling.h bits by Andi Kleen Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-tk7xdi1cvvxewixzke8t8le1@git.kernel.org [ Fixed build error. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
* UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel ↵David Howells2012-10-021-1/+1
| | | | | | | | | | | | system headers Convert #include "..." to #include <path/...> in kernel system headers. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
* x86_64: Work around old GAS bugTao Guo2012-09-261-25/+23
| | | | | | | | | | | | | | | | | | | GAS in binutils(2.16.91) could not parse parentheses within macro parameters unless fully parenthesized, and this is a workaround to make old gas work without generating below errors: arch/x86/kernel/entry_64.S: Assembler messages: arch/x86/kernel/entry_64.S:387: Error: too many positional arguments arch/x86/kernel/entry_64.S:389: Error: too many positional arguments [...] Signed-off-by: Tao Guo <glorioustao@gmail.com> Reluctantly-Acked-by: Jan Beulich <jbeulich@novell.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/1348648102-12653-1-git-send-email-glorioustao@gmail.com [ Jan argues that these old GAS versions are fragile - which is so, but lets give them a chance. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86, asm: Flip RESTORE_ARGS arguments logicBorislav Petkov2011-06-031-13/+8
| | | | | | | | | | | ... thus getting rid of the "else" part of the conditional statement in the macro. No functionality change. Signed-off-by: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1306873314-32523-4-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, asm: Flip SAVE_ARGS arguments logicBorislav Petkov2011-06-031-5/+3
| | | | | | | | | | This saves us the else part of the conditional statement in the macro. No functionality change. Signed-off-by: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1306873314-32523-3-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, asm: Thin down SAVE/RESTORE_* asm macrosBorislav Petkov2011-06-031-60/+41
| | | | | | | | | | | Use dwarf2 cfi annotation macros, making SAVE/RESTORE_* marginally more readable. No functionality change. Signed-off-by: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1306873314-32523-2-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, asm: Fix CFI macro invocations to deal with shortcomings in gasJan Beulich2010-10-191-25/+27
| | | | | | | | | | | | | | | | | | gas prior to (perhaps) 2.16.90 has problems with passing non- parenthesized expressions containing spaces to macros. Spaces, however, get inserted by cpp between any macro expanding to a number and a subsequent + or -. For the +, current x86 gas then removes the space again (future gas may not do so), but for the - the space gets retained and is then considered a separator between macro arguments. Fix the respective definitions for both the - and + cases, so that they neither contain spaces nor make cpp insert any (the latter by adding seemingly redundant parentheses). Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4CBDBEBA020000780001E05A@vpn.id2.novell.com> Cc: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86: document 64-bit and 32-bit function call convention ABIIngo Molnar2009-02-031-3/+53
| | | | | | - also clean up the calling.h file a tiny bit Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, um: ... and asm-x86 moveAl Viro2008-10-221-0/+170
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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