Fix cpu_relax()

cpu_relax() is supposed to be a compiler barrier - this fixes a bug with
btree_write_buffer_flush() getting stuck.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index a21b7cc3041cb032f2f173efedd4c8c59e8717ac..a55b8a9b5d17f05ccbffce08f02628fba9c296ab 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -132,8 +132,8 @@
 
 #define might_sleep()
 
-#define cpu_relax()            do {} while (0)
-#define cpu_relax_lowlatency() do {} while (0)
+#define cpu_relax()            barrier()
+#define cpu_relax_lowlatency() barrier()
 
 #define panic(fmt, ...)                                        \
 do {                                                   \