fanotify: use __aligned_u64 in fanotify userspace metadata

Currently the userspace struct exposed by fanotify uses __attribute__((packed)) to make sure that alignment works on multiarch platforms. Since this causes a severe performance penalty on some platforms we are going to switch to using explicit alignment notation on the 64bit values so we don't have to use 'packed' Signed-off-by: Eric Paris <[email protected]>
akeromi · Oct 28, 2010 · 2868201 · 2868201
1 parent 4231a23
commit 2868201
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
@@ -79,10 +79,10 @@
 struct fanotify_event_metadata {
 	__u32 event_len;
 	__u32 vers;
-	__u64 mask;
+	__aligned_u64 mask;
 	__s32 fd;
 	__s32 pid;
-} __attribute__ ((packed));
+};
 
 struct fanotify_response {
 	__s32 fd;