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| author | Dimitri Sivanich <sivanich@sgi.com> | 2012-02-08 12:39:07 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-02-13 20:45:38 -0500 |
| commit | 074b85175a43a23fdbde60f55feea636e0bf0f85 (patch) | |
| tree | e6f6fdd82854b2bf25ea5b404cee010806a8fced /kernel/pid.c | |
| parent | 1d6f2097865e64963e90cce04980dce2f9fc023f (diff) | |
| download | blackbird-op-linux-074b85175a43a23fdbde60f55feea636e0bf0f85.tar.gz blackbird-op-linux-074b85175a43a23fdbde60f55feea636e0bf0f85.zip | |
vfs: fix panic in __d_lookup() with high dentry hashtable counts
When the number of dentry cache hash table entries gets too high
(2147483648 entries), as happens by default on a 16TB system, use of a
signed integer in the dcache_init() initialization loop prevents the
dentry_hashtable from getting initialized, causing a panic in
__d_lookup(). Fix this in dcache_init() and similar areas.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/pid.c')
| -rw-r--r-- | kernel/pid.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index ce8e00deaccb..9f08dfabaf13 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -543,12 +543,12 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) */ void __init pidhash_init(void) { - int i, pidhash_size; + unsigned int i, pidhash_size; pid_hash = alloc_large_system_hash("PID", sizeof(*pid_hash), 0, 18, HASH_EARLY | HASH_SMALL, &pidhash_shift, NULL, 4096); - pidhash_size = 1 << pidhash_shift; + pidhash_size = 1U << pidhash_shift; for (i = 0; i < pidhash_size; i++) INIT_HLIST_HEAD(&pid_hash[i]); |
