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authorSven Wegener <sven.wegener@stealer.net>2009-02-11 13:04:23 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-11 14:25:35 -0800
commitfc3501d411d34823fb9be248a95a0c44f945866f (patch)
tree9a16de761b4c7d3401149a212b8004df23fbbcca /mm
parent35887b1cf74dc751dd0574b26515142d3cea9376 (diff)
downloadlinux-fc3501d411d34823fb9be248a95a0c44f945866f.tar.gz
mm: fix dirty_bytes/dirty_background_bytes sysctls on 64bit arches
We need to pass an unsigned long as the minimum, because it gets casted to an unsigned long in the sysctl handler. If we pass an int, we'll access four more bytes on 64bit arches, resulting in a random minimum value. [rientjes@google.com: fix type of `old_bytes'] Signed-off-by: Sven Wegener <sven.wegener@stealer.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page-writeback.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index dc32dae01e5..c17005e7397 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -209,7 +209,7 @@ int dirty_bytes_handler(struct ctl_table *table, int write,
struct file *filp, void __user *buffer, size_t *lenp,
loff_t *ppos)
{
- int old_bytes = vm_dirty_bytes;
+ unsigned long old_bytes = vm_dirty_bytes;
int ret;
ret = proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos);