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authorAlan Stern <stern@rowland.harvard.edu>2006-10-04 05:17:05 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 10:55:30 -0400
commite6a92013ba458804161c0c5b6d134d82204dc233 (patch)
treeecee5fdcef80d1dba0ac6ea87370931ea39ffecd /include/linux/srcu.h
parenteabc069401bcf45bcc3f19e643017bf761780aa8 (diff)
[PATCH] SRCU: report out-of-memory errors
Currently the init_srcu_struct() routine has no way to report out-of-memory errors. This patch (as761) makes it return -ENOMEM when the per-cpu data allocation fails. The patch also makes srcu_init_notifier_head() report a BUG if a notifier head can't be initialized. Perhaps it should return -ENOMEM instead, but in the most likely cases where this might occur I don't think any recovery is possible. Notifier chains generally are not created dynamically. [akpm@osdl.org: avoid statement-with-side-effect in macro] Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/srcu.h')
-rw-r--r--include/linux/srcu.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 8a45367b5f3a..aca0eee53930 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -43,7 +43,7 @@ struct srcu_struct {
43#define srcu_barrier() 43#define srcu_barrier()
44#endif /* #else #ifndef CONFIG_PREEMPT */ 44#endif /* #else #ifndef CONFIG_PREEMPT */
45 45
46void init_srcu_struct(struct srcu_struct *sp); 46int init_srcu_struct(struct srcu_struct *sp);
47void cleanup_srcu_struct(struct srcu_struct *sp); 47void cleanup_srcu_struct(struct srcu_struct *sp);
48int srcu_read_lock(struct srcu_struct *sp) __acquires(sp); 48int srcu_read_lock(struct srcu_struct *sp) __acquires(sp);
49void srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp); 49void srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp);