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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>
This commit is contained in:
H Hartley Sweeten 2011-10-31 17:12:32 -07:00 committed by Linus Torvalds
parent 4e101b0e6a
commit b9c321fd87
1 changed files with 6 additions and 4 deletions
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10
lib/bitmap.c
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@ -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);