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>
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 2f4412e..0d4a127 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -419,7 +419,7 @@
{
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 @@
{
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 @@
{
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 @@
{
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);