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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2014-06-04 16:07:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:03 -0700
commitf7f28ca98b9a7a99fc55df2dddcf49857ab004f0 (patch)
tree42be5cf168124aa24fafe7768a5bba73c059d610
parent7c8e0181e6e0b8079c4c2ce902bf52d7a2c6fa5d (diff)
mm: constify nmask argument to mbind()
The nmask argument to mbind() is const according to the userspace header numaif.h, and since the kernel does indeed not modify it, it might as well be declared const in the kernel. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/syscalls.h2
-rw-r--r--mm/mempolicy.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index a4a0588c539..bfef0be279d 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -723,7 +723,7 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
int flags);
asmlinkage long sys_mbind(unsigned long start, unsigned long len,
unsigned long mode,
- unsigned long __user *nmask,
+ const unsigned long __user *nmask,
unsigned long maxnode,
unsigned flags);
asmlinkage long sys_get_mempolicy(int __user *policy,
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 78e1472933e..727187f1155 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1362,7 +1362,7 @@ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode,
}
SYSCALL_DEFINE6(mbind, unsigned long, start, unsigned long, len,
- unsigned long, mode, unsigned long __user *, nmask,
+ unsigned long, mode, const unsigned long __user *, nmask,
unsigned long, maxnode, unsigned, flags)
{
nodemask_t nodes;