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ck_spinlock/mcs: Remove unnecessary fences, serialize unload.

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ck_pring
Samy Al Bahra 12 years ago
parent 79e336cfbc
commit 1d61147c01
1 changed files with 1 additions and 2 deletions
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3
include/ck_spinlock.h
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@ -529,7 +529,6 @@ ck_spinlock_mcs_lock(struct ck_spinlock_mcs **queue, struct ck_spinlock_mcs *nod
*/ */
ck_pr_store_uint(&node->locked, true); ck_pr_store_uint(&node->locked, true);
ck_pr_store_ptr(&node->next, NULL); ck_pr_store_ptr(&node->next, NULL);
ck_pr_fence_store();
/* /*
* Swap current tail with current lock request. If the swap operation * Swap current tail with current lock request. If the swap operation
@ -553,7 +552,6 @@ ck_spinlock_mcs_unlock(struct ck_spinlock_mcs **queue, struct ck_spinlock_mcs *n
{ {
struct ck_spinlock_mcs *next; struct ck_spinlock_mcs *next;
ck_pr_fence_load();
next = ck_pr_load_ptr(&node->next); next = ck_pr_load_ptr(&node->next);
if (next == NULL) { if (next == NULL) {
/* /*
@ -580,6 +578,7 @@ ck_spinlock_mcs_unlock(struct ck_spinlock_mcs **queue, struct ck_spinlock_mcs *n
} }
/* Allow the next lock operation to complete. */ /* Allow the next lock operation to complete. */
ck_pr_fence_memory();
ck_pr_store_uint(&next->locked, false); ck_pr_store_uint(&next->locked, false);
return; return;

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