linux-pinenote/include/asm-x86/mman.h

#ifndef ASM_X86__MMAN_H
#define ASM_X86__MMAN_H

#include <asm-generic/mman.h>

#define MAP_32BIT	0x40		/* only give out 32bit addresses */

#define MAP_GROWSDOWN	0x0100		/* stack-like segment */
#define MAP_DENYWRITE	0x0800		/* ETXTBSY */
#define MAP_EXECUTABLE	0x1000		/* mark it as an executable */
#define MAP_LOCKED	0x2000		/* pages are locked */
#define MAP_NORESERVE	0x4000		/* don't check for reservations */
#define MAP_POPULATE	0x8000		/* populate (prefault) pagetables */
#define MAP_NONBLOCK	0x10000		/* do not block on IO */
#define MAP_STACK	0x20000		/* give out an address that is best suited for process/thread stacks */

#define MCL_CURRENT	1		/* lock all current mappings */
#define MCL_FUTURE	2		/* lock all future mappings */

#endif /* ASM_X86__MMAN_H */
x86: consolidate header guards This patch is the result of an automatic script that consolidates the format of all the headers in include/asm-x86/. The format: 1. No leading underscore. Names with leading underscores are reserved. 2. Pathname components are separated by two underscores. So we can distinguish between mm_types.h and mm/types.h. 3. Everything except letters and numbers are turned into single underscores. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> 2008-06-18 17:08:48 +02:00			`#ifndef ASM_X86__MMAN_H`
			`#define ASM_X86__MMAN_H`
x86: unify include/asm/mman_32/64.h Same file, except for the extra 64bit MAP_32BIT define, which does not hurt for 32 bit compiles. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2007-10-15 23:28:21 +02:00
			`#include <asm-generic/mman.h>`

			`#define MAP_32BIT 0x40 /* only give out 32bit addresses */`

			`#define MAP_GROWSDOWN 0x0100 /* stack-like segment */`
			`#define MAP_DENYWRITE 0x0800 /* ETXTBSY */`
			`#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */`
			`#define MAP_LOCKED 0x2000 /* pages are locked */`
			`#define MAP_NORESERVE 0x4000 /* don't check for reservations */`
			`#define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */`
			`#define MAP_NONBLOCK 0x10000 /* do not block on IO */`
x86: add MAP_STACK mmap flag as per this discussion: http://lkml.org/lkml/2008/8/12/423 Pardo reported that 64-bit threaded apps, if their stacks exceed the combined size of ~4GB, slow down drastically in pthread_create() - because glibc uses MAP_32BIT to allocate the stacks. The use of MAP_32BIT is a legacy hack - to speed up context switching on certain early model 64-bit P4 CPUs. So introduce a new flag to be used by glibc instead, to not constrain 64-bit apps like this. glibc can switch to this new flag straight away - it will be ignored by the kernel. If those old CPUs ever matter to anyone, support for it can be implemented. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Ulrich Drepper <drepper@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-08-13 18:02:18 +02:00			`#define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */`
x86: unify include/asm/mman_32/64.h Same file, except for the extra 64bit MAP_32BIT define, which does not hurt for 32 bit compiles. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2007-10-15 23:28:21 +02:00
			`#define MCL_CURRENT 1 /* lock all current mappings */`
			`#define MCL_FUTURE 2 /* lock all future mappings */`

x86: consolidate header guards This patch is the result of an automatic script that consolidates the format of all the headers in include/asm-x86/. The format: 1. No leading underscore. Names with leading underscores are reserved. 2. Pathname components are separated by two underscores. So we can distinguish between mm_types.h and mm/types.h. 3. Everything except letters and numbers are turned into single underscores. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> 2008-06-18 17:08:48 +02:00			`#endif /* ASM_X86__MMAN_H */`