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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2008-08-08 16:21:02 -0400
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2008-08-08 16:21:02 -0400
commite4ddcb0a6bf04d53ce77b4eb87bbbb32c4261d11 (patch)
treed27d2fea50a384d97aa2d0cf5c8657c916f761d4 /ipc/shm.c
parentf2afa7711f8585ffc088ba538b9a510e0d5dca12 (diff)
parent6e86841d05f371b5b9b86ce76c02aaee83352298 (diff)
Merge commit 'v2.6.27-rc1' into for-linus
Diffstat (limited to 'ipc/shm.c')
-rw-r--r--ipc/shm.c24
1 files changed, 5 insertions, 19 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 790240cd067..e77ec698cf4 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -112,23 +112,8 @@ void __init shm_init (void)
}
/*
- * shm_lock_(check_)down routines are called in the paths where the rw_mutex
- * is held to protect access to the idr tree.
- */
-static inline struct shmid_kernel *shm_lock_down(struct ipc_namespace *ns,
- int id)
-{
- struct kern_ipc_perm *ipcp = ipc_lock_down(&shm_ids(ns), id);
-
- if (IS_ERR(ipcp))
- return (struct shmid_kernel *)ipcp;
-
- return container_of(ipcp, struct shmid_kernel, shm_perm);
-}
-
-/*
* shm_lock_(check_) routines are called in the paths where the rw_mutex
- * is not held.
+ * is not necessarily held.
*/
static inline struct shmid_kernel *shm_lock(struct ipc_namespace *ns, int id)
{
@@ -211,7 +196,7 @@ static void shm_close(struct vm_area_struct *vma)
down_write(&shm_ids(ns).rw_mutex);
/* remove from the list of attaches of the shm segment */
- shp = shm_lock_down(ns, sfd->id);
+ shp = shm_lock(ns, sfd->id);
BUG_ON(IS_ERR(shp));
shp->shm_lprid = task_tgid_vnr(current);
shp->shm_dtim = get_seconds();
@@ -577,7 +562,8 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
if (is_file_hugepages(shp->shm_file)) {
struct address_space *mapping = inode->i_mapping;
- *rss += (HPAGE_SIZE/PAGE_SIZE)*mapping->nrpages;
+ struct hstate *h = hstate_file(shp->shm_file);
+ *rss += pages_per_huge_page(h) * mapping->nrpages;
} else {
struct shmem_inode_info *info = SHMEM_I(inode);
spin_lock(&info->lock);
@@ -931,7 +917,7 @@ invalid:
out_nattch:
down_write(&shm_ids(ns).rw_mutex);
- shp = shm_lock_down(ns, shmid);
+ shp = shm_lock(ns, shmid);
BUG_ON(IS_ERR(shp));
shp->shm_nattch--;
if(shp->shm_nattch == 0 &&