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>

4 files changed, 10 insertions, 17 deletions

diff --git a/arch/powerpc/include/uapi/asm/mman.h b/arch/powerpc/include/uapi/asm/mman.h
index 65065ce32814..c0c737215b00 100644
--- a/arch/powerpc/include/uapi/asm/mman.h
+++ b/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
diff --git a/arch/sparc/include/uapi/asm/mman.h b/arch/sparc/include/uapi/asm/mman.h
index f6f99ec65bb3..cec9f4109687 100644
--- a/arch/sparc/include/uapi/asm/mman.h
+++ b/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__ */
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h
index 93a8b420ce1e..63b1f506ea67 100644
--- a/include/uapi/asm-generic/mman-common.h
+++ b/include/uapi/asm-generic/mman-common.h
@@ -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 */
 
diff --git a/include/uapi/asm-generic/mman.h b/include/uapi/asm-generic/mman.h
index 2dffcbf705b3..57e8195d0b53 100644
--- a/include/uapi/asm-generic/mman.h
+++ b/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 */