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| author | H Hartley Sweeten <hartleys@visionengravers.com> | 2012-05-31 16:26:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 17:49:27 -0700 |
| commit | c67e5382fb3f312c95d8d01db40fb398e6da454d (patch) | |
| tree | 6e1830da7102e4f873d05b067aa39ba4425eefbc /init/do_mounts_initrd.c | |
| parent | 243f3803cf2a3665092c5fd6f924f453694681a6 (diff) | |
| download | lwn-c67e5382fb3f312c95d8d01db40fb398e6da454d.tar.gz lwn-c67e5382fb3f312c95d8d01db40fb398e6da454d.zip | |
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_initrd.c')
| -rw-r--r-- | init/do_mounts_initrd.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index 9047330c73e9..135959a276be 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.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" +#endif + #include <linux/unistd.h> #include <linux/kernel.h> #include <linux/fs.h> |