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mempolicy: fix get_mempolicy() for relative and static nodes

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Discovered while testing other mempolicy changes:

get_mempolicy() does not handle static/relative mode flags correctly.
Return the value that the user specified so that it can be restored
via set_mempolicy() if desired.

Signed-off-by: Lee Schermerhorn <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Ravikiran Thirumalai <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Lee Schermerhorn 2010-03-23 13:35:41 -07:00 • committed by Linus Torvalds
commit c6b6ef8bb0
1 changed files with 7 additions and 3 deletions
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10
mm/mempolicy.c
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@ -806,9 +806,13 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask,
err = 0;
if (nmask) {
task_lock(current);
get_policy_nodemask(pol, nmask);
task_unlock(current);
if (mpol_store_user_nodemask(pol)) {
*nmask = pol->w.user_nodemask;
} else {
task_lock(current);
get_policy_nodemask(pol, nmask);
task_unlock(current);
}
}
out: