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fix undefined reference to user_shm_unlock 

My 353d5c30c6 "mm: fix hugetlb bug due to
user_shm_unlock call" broke the CONFIG_SYSVIPC !CONFIG_MMU build of both
2.6.31 and 2.6.30.6: "undefined reference to `user_shm_unlock'".

gcc didn't understand my comment! so couldn't figure out to optimize
away user_shm_unlock() from the error path in the hugetlb-less case, as
it does elsewhere.  Help it to do so, in a language it understands.

Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2009-09-12 12:21:27 +01:00 committed by Linus Torvalds
parent 69def9f05d
commit 2195d2818c
1 changed files with 1 additions and 1 deletions
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2
ipc/shm.c
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@ -410,7 +410,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
return error;
no_id:
if (shp->mlock_user) /* shmflg & SHM_HUGETLB case */
if (is_file_hugepages(file) && shp->mlock_user)
user_shm_unlock(size, shp->mlock_user);
fput(file);
no_file: