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| author | H Hartley Sweeten <hartleys@visionengravers.com> | 2011-11-01 04:12:32 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 04:30:56 +0400 |
| commit | b9c321fd87b61f70888511d286500519d8b34141 (patch) | |
| tree | a9b85ebc499116d3db03ab1b6a0bb858b54ed4b3 /lib | |
| parent | 4e101b0e6aa885f5786a058eefc1ce4b7cc7c44e (diff) | |
| download | linux-b9c321fd87b61f70888511d286500519d8b34141.tar.xz | |
lib/bitmap.c: quiet sparse noise about address space
__bitmap_parse() and __bitmap_parselist() both take a pointer to a kernel
buffer as a parameter and then cast it to a pointer to user buffer for use
in cases when the parameter is_user indicates that the buffer is actually
located in user space. This casting, and the casts in the callers,
results in sparse noise like the following:
warning: incorrect type in initializer (different address spaces)
expected char const [noderef] <asn:1>*ubuf
got char const *buf
warning: cast removes address space of expression
Since these casts are intentional, use __force to quiet the noise.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Andi Kleen <ak@linux.intel.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/bitmap.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 2f4412e4d071..0d4a127dd9b3 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -419,7 +419,7 @@ int __bitmap_parse(const char *buf, unsigned int buflen, { int c, old_c, totaldigits, ndigits, nchunks, nbits; u32 chunk; - const char __user *ubuf = buf; + const char __user __force *ubuf = (const char __user __force *)buf; bitmap_zero(maskp, nmaskbits); @@ -504,7 +504,9 @@ int bitmap_parse_user(const char __user *ubuf, { if (!access_ok(VERIFY_READ, ubuf, ulen)) return -EFAULT; - return __bitmap_parse((const char *)ubuf, ulen, 1, maskp, nmaskbits); + return __bitmap_parse((const char __force *)ubuf, + ulen, 1, maskp, nmaskbits); + } EXPORT_SYMBOL(bitmap_parse_user); @@ -594,7 +596,7 @@ static int __bitmap_parselist(const char *buf, unsigned int buflen, { unsigned a, b; int c, old_c, totaldigits; - const char __user *ubuf = buf; + const char __user __force *ubuf = (const char __user __force *)buf; int exp_digit, in_range; totaldigits = c = 0; @@ -694,7 +696,7 @@ int bitmap_parselist_user(const char __user *ubuf, { if (!access_ok(VERIFY_READ, ubuf, ulen)) return -EFAULT; - return __bitmap_parselist((const char *)ubuf, + return __bitmap_parselist((const char __force *)ubuf, ulen, 1, maskp, nmaskbits); } EXPORT_SYMBOL(bitmap_parselist_user); |