hugetlbfs: do not call user_shm_lock() for MAP_HUGETLB fix
commitef1ff6b8c08954bc203b59e887d1e580dd91755a
authorFrom: Mel Gorman <mel@csn.ul.ie>
Wed, 23 Sep 2009 22:56:05 +0000 (23 15:56 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 24 Sep 2009 14:20:56 +0000 (24 07:20 -0700)
tree6bffcfc02cb57087362defe4cf045c6f70f62a6d
parent2c6854fdadf940678fd54779b778f6faafb870bb
hugetlbfs: do not call user_shm_lock() for MAP_HUGETLB fix

Commit 6bfde05bf5c ("hugetlbfs: allow the creation of files suitable for
MAP_PRIVATE on the vfs internal mount") altered can_do_hugetlb_shm() to
check if a file is being created for shared memory or mmap().  If this
returns false, we then unconditionally call user_shm_lock() triggering a
warning.  This block should never be entered for MAP_HUGETLB.  This
patch partially reverts the problem and fixes the check.

Signed-off-by: Eric B Munson <ebmunson@us.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/hugetlbfs/inode.c