ck_bytelock: Fall-back to store_8 if FAS is unavailable.

10 years ago · 41c1080f43
parent c2ce635080
commit 41c1080f43
1 changed files with 6 additions and 1 deletions
--- a/include/ck_bytelock.h
+++ b/include/ck_bytelock.h
@ -154,8 +154,13 @@ ck_bytelock_read_lock(struct ck_bytelock *bytelock, unsigned int slot)
 	slot -= 1;
 	for (;;) {
-		ck_pr_faa_8(&bytelock->readers[slot], true);
+#ifdef CK_F_PR_FAA_8
 		ck_pr_fas_8(&bytelock->readers[slot], true);
 		ck_pr_fence_atomic_load();
 #else
 		ck_pr_store_8(&bytelock->readers[slot], true);
 		ck_pr_fence_store_load();
 #endif
 		/*
 		 * If there is no owner at this point, our slot has