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author | Dave Gordon <david.s.gordon@intel.com> | 2015-07-01 00:58:54 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-01 05:44:59 +0300 |
commit | 2a1bf8f93b33992bb0457512b28d046e279bbd7e (patch) | |
tree | 48db340683a7c617dd70c66a282f43d85c2714ad /lib | |
parent | 4dc7daf843f3914c9c0c7efb71b8f251c9c4636f (diff) | |
download | linux-2a1bf8f93b33992bb0457512b28d046e279bbd7e.tar.xz |
lib/scatterlist: mark input buffer parameters as 'const'
The 'buf' parameter of sg(p)copy_from_buffer() can and should be
const-qualified, although because of the shared implementation of
_to_buffer() and _from_buffer(), we have to cast this away internally.
This means that callers who have a 'const' buffer containing the data to
be copied to the sg-list no longer have to cast away the const-ness
themselves. It also enables improved coverage by code analysis tools.
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/scatterlist.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 965c36e7a5a4..317b62c6da3c 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -701,9 +701,9 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, * **/ size_t sg_copy_from_buffer(struct scatterlist *sgl, unsigned int nents, - void *buf, size_t buflen) + const void *buf, size_t buflen) { - return sg_copy_buffer(sgl, nents, buf, buflen, 0, false); + return sg_copy_buffer(sgl, nents, (void *)buf, buflen, 0, false); } EXPORT_SYMBOL(sg_copy_from_buffer); @@ -736,9 +736,9 @@ EXPORT_SYMBOL(sg_copy_to_buffer); * **/ size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents, - void *buf, size_t buflen, off_t skip) + const void *buf, size_t buflen, off_t skip) { - return sg_copy_buffer(sgl, nents, buf, buflen, skip, false); + return sg_copy_buffer(sgl, nents, (void *)buf, buflen, skip, false); } EXPORT_SYMBOL(sg_pcopy_from_buffer); |