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authorLaurent Dufour <ldufour@linux.vnet.ibm.com>2015-06-25 02:56:19 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 03:49:41 +0300
commit4abad2ca4a4dbdd4a218c12451231ab628f2e60c (patch)
tree4e9f1494ef5d8cffbdf379317bb144a96aaad9d8 /include/linux/mm-arch-hooks.h
parent2ae416b142b625c58c9ccb039aa3ef48ad0e9bae (diff)
downloadlinux-4abad2ca4a4dbdd4a218c12451231ab628f2e60c.tar.xz
mm: new arch_remap() hook
Some architectures would like to be triggered when a memory area is moved through the mremap system call. This patch introduces a new arch_remap() mm hook which is placed in the path of mremap, and is called before the old area is unmapped (and the arch_unmap() hook is called). Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm-arch-hooks.h')
-rw-r--r--include/linux/mm-arch-hooks.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mm-arch-hooks.h b/include/linux/mm-arch-hooks.h
index 63005e367abd..4efc3f56e6df 100644
--- a/include/linux/mm-arch-hooks.h
+++ b/include/linux/mm-arch-hooks.h
@@ -13,4 +13,13 @@
#include <asm/mm-arch-hooks.h>
+#ifndef arch_remap
+static inline void arch_remap(struct mm_struct *mm,
+ unsigned long old_start, unsigned long old_end,
+ unsigned long new_start, unsigned long new_end)
+{
+}
+#define arch_remap arch_remap
+#endif
+
#endif /* _LINUX_MM_ARCH_HOOKS_H */