path: root/init/do_mounts_md.c
diff options
authorH Hartley Sweeten <hartleys@visionengravers.com>2012-05-31 16:26:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-31 17:49:27 -0700
commitc67e5382fb3f312c95d8d01db40fb398e6da454d (patch)
tree6e1830da7102e4f873d05b067aa39ba4425eefbc /init/do_mounts_md.c
parent243f3803cf2a3665092c5fd6f924f453694681a6 (diff)
init: disable sparse checking of the mount.o source files
The init/mount.o source files produce a number of sparse warnings of the type: warning: incorrect type in argument 1 (different address spaces) expected char [noderef] <asn:1>*dev_name got char *name This is due to the syscalls expecting some of the arguments to be user pointers but they are being passed as kernel pointers. This is harmless but adds a lot of noise to a sparse build. To limit the noise just disable the sparse checking in the relevant source files, but still display a warning so that the user knows this has been done. Since the sparse checking has been disabled we can also remove the __user __force casts that are scattered thru the source. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/do_mounts_md.c')
1 files changed, 11 insertions, 1 deletions
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index 32c4799b8c91..8cb6db54285b 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -1,3 +1,13 @@
+ * Many of the syscalls used in this file expect some of the arguments
+ * to be __user pointers not __kernel pointers. To limit the sparse
+ * noise, turn off sparse checking for this file.
+ */
+#ifdef __CHECKER__
+#undef __CHECKER__
+#warning "Sparse checking disabled for this file"
#include <linux/delay.h>
#include <linux/raid/md_u.h>
#include <linux/raid/md_p.h>
@@ -283,7 +293,7 @@ static void __init autodetect_raid(void)
- fd = sys_open((const char __user __force *) "/dev/md0", 0, 0);
+ fd = sys_open("/dev/md0", 0, 0);
if (fd >= 0) {
sys_ioctl(fd, RAID_AUTORUN, raid_autopart);