FS-Cache: Bit waiting helpers

Add helpers for use with wait_on_bit(). Signed-off-by: David Howells <[email protected]> Acked-by: Steve Dickson <[email protected]> Acked-by: Trond Myklebust <[email protected]> Acked-by: Al Viro <[email protected]> Tested-by: Daire Byrne <[email protected]>
mna · Apr 3, 2009 · 2868cbe · 2868cbe
1 parent 726dd7f
commit 2868cbe
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diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
@@ -82,6 +82,9 @@ extern unsigned fscache_defer_create;
 extern unsigned fscache_debug;
 extern struct kobject *fscache_root;
 
+extern int fscache_wait_bit(void *);
+extern int fscache_wait_bit_interruptible(void *);
+
 /*
  * fsc-proc.c
  */

diff --git a/fs/fscache/main.c b/fs/fscache/main.c
@@ -102,3 +102,23 @@ static void __exit fscache_exit(void)
 }
 
 module_exit(fscache_exit);
+
+/*
+ * wait_on_bit() sleep function for uninterruptible waiting
+ */
+int fscache_wait_bit(void *flags)
+{
+	schedule();
+	return 0;
+}
+EXPORT_SYMBOL(fscache_wait_bit);
+
+/*
+ * wait_on_bit() sleep function for interruptible waiting
+ */
+int fscache_wait_bit_interruptible(void *flags)
+{
+	schedule();
+	return signal_pending(current);
+}
+EXPORT_SYMBOL(fscache_wait_bit_interruptible);