AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

dlm: don't do pointless NULL check, use kzalloc and fix order of arguments

Browse Source 
In fs/dlm/lock.c in the dlm_scan_waiters() function there are 3 small
issues:

1) There's no need to test the return value of the allocation and do a
memset if is succeedes. Just use kzalloc() to obtain zeroed memory.

2) Since kfree() handles NULL pointers gracefully, the test of
'warned' against NULL before the kfree() after the loop is completely
pointless. Remove it.

3) The arguments to kmalloc() (now kzalloc()) were swapped. Thanks to
Dr. David Alan Gilbert for pointing this out.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Jesper Juhl 2011-07-10 22:54:31 +02:00 committed by David Teigland
parent bcaadf5c1a
commit 5d70828a77
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/dlm/lock.c
View File

@ -849,9 +849,7 @@ void dlm_scan_waiters(struct dlm_ls *ls)
if (!num_nodes) {
num_nodes = ls->ls_num_nodes;
warned = kmalloc(GFP_KERNEL, num_nodes * sizeof(int));
if (warned)
memset(warned, 0, num_nodes * sizeof(int));
warned = kzalloc(num_nodes * sizeof(int), GFP_KERNEL);
}
if (!warned)
continue;
@ -863,9 +861,7 @@ void dlm_scan_waiters(struct dlm_ls *ls)
dlm_config.ci_waitwarn_us, lkb->lkb_wait_nodeid);
}
mutex_unlock(&ls->ls_waiters_mutex);
if (warned)
kfree(warned);
kfree(warned);
if (debug_expired)
log_debug(ls, "scan_waiters %u warn %u over %d us max %lld us",