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mm/mmap: move common defines to mman-common.h 

Two architecture that use arch specific MMAP flags are powerpc and
sparc.  We still have few flag values common across them and other
architectures.  Consolidate this in mman-common.h.

Also update the comment to indicate where to find HugeTLB specific
reserved values

Link: http://lkml.kernel.org/r/20190604090950.31417-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aneesh Kumar K.V 2019-07-16 16:30:41 -07:00 committed by Linus Torvalds
parent 22fcea6f85
commit 8aa3c927ec
4 changed files with 10 additions and 17 deletions
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6
arch/powerpc/include/uapi/asm/mman.h
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@ -21,15 +21,11 @@
#define MAP_DENYWRITE 0x0800 /* ETXTBSY */
#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
#define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
#define MCL_FUTURE 0x4000 /* lock all additions to address space */
#define MCL_ONFAULT 0x8000 /* lock all pages that are faulted in */
#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 MAP_HUGETLB 0x40000 /* create a huge page mapping */
/* Override any generic PKEY permission defines */
#define PKEY_DISABLE_EXECUTE 0x4
#undef PKEY_ACCESS_MASK

6
arch/sparc/include/uapi/asm/mman.h
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@ -22,10 +22,4 @@
#define MCL_FUTURE 0x4000 /* lock all additions to address space */
#define MCL_ONFAULT 0x8000 /* lock all pages that are faulted in */
#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 MAP_HUGETLB 0x40000 /* create a huge page mapping */
#endif /* _UAPI__SPARC_MMAN_H__ */

6
include/uapi/asm-generic/mman-common.h
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@ -20,7 +20,11 @@
#define MAP_FIXED 0x10 /* Interpret addr exactly */
#define MAP_ANONYMOUS 0x20 /* don't use a file */
/* 0x0100 - 0x40000 flags are defined in asm-generic/mman.h */
/* 0x0100 - 0x4000 flags are defined in asm-generic/mman.h */
#define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */
#define MAP_NONBLOCK 0x010000 /* do not block on IO */
#define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */
#define MAP_HUGETLB 0x040000 /* create a huge page mapping */
#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */
#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */

9
include/uapi/asm-generic/mman.h
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@ -9,12 +9,11 @@
#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 MAP_HUGETLB 0x40000 /* create a huge page mapping */
/* Bits [26:31] are reserved, see mman-common.h for MAP_HUGETLB usage */
/*
* Bits [26:31] are reserved, see asm-generic/hugetlb_encode.h
* for MAP_HUGETLB usage
*/
#define MCL_CURRENT 1 /* lock all current mappings */
#define MCL_FUTURE 2 /* lock all future mappings */