The patch titled
Subject: mm/mmap: move common defines to mman-common.h
has been added to the -mm tree. Its filename is
mm-mmap-move-common-defines-to-mman-commonh.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-move-common-defines-to-mman-commonh.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-move-common-defines-to-mman-commonh.patch
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/uapi/asm/mman.h | 6 +-----
arch/sparc/include/uapi/asm/mman.h | 6 ------
include/uapi/asm-generic/mman-common.h | 6 +++++-
include/uapi/asm-generic/mman.h | 9 ++++-----
4 files changed, 10 insertions(+), 17 deletions(-)
--- a/arch/powerpc/include/uapi/asm/mman.h~mm-mmap-move-common-defines-to-mman-commonh
+++ a/arch/powerpc/include/uapi/asm/mman.h
@@ -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
--- a/arch/sparc/include/uapi/asm/mman.h~mm-mmap-move-common-defines-to-mman-commonh
+++ a/arch/sparc/include/uapi/asm/mman.h
@@ -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__ */
--- a/include/uapi/asm-generic/mman-common.h~mm-mmap-move-common-defines-to-mman-commonh
+++ a/include/uapi/asm-generic/mman-common.h
@@ -25,7 +25,11 @@
# define MAP_UNINITIALIZED 0x0 /* Don't support this flag */
#endif
-/* 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 */
--- a/include/uapi/asm-generic/mman.h~mm-mmap-move-common-defines-to-mman-commonh
+++ a/include/uapi/asm-generic/mman.h
@@ -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 */
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxx are
mm-move-map_sync-to-asm-generic-mman-commonh.patch
mm-mmap-move-common-defines-to-mman-commonh.patch
