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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-07-11 19:27:31 -0400 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2008-07-11 19:27:31 -0400 |
commit | e7dfb2463e3c1b10c38372023e0186d25dec1fa6 (patch) | |
tree | 48e05520ccaf7e0c8a2f5bdfc9851069277a6a79 /arch/parisc/nm | |
parent | f3b35f063e9a795495fe2f7a2fe55fab11f8ab12 (diff) |
ext4: Fix mb_find_next_bit not to return larger than max
Some architectures implement ext4_find_next_bit and
ext4_find_next_zero_bit in such a way that they return
greater than max for some input values. Make sure
mb_find_next_bit and mb_find_next_zero_bit return the
right values.
On 2.6.25 we have include/asm-x86/bitops_32.h
static inline unsigned find_first_bit(const unsigned long *addr, unsigned size)
{
unsigned x = 0;
while (x < size) {
unsigned long val = *addr++;
if (val)
return __ffs(val) + x;
x += (sizeof(*addr)<<3);
}
return x;
}
This can return value greater than size.
Reported and fixed here for lustre
https://bugzilla.lustre.org/show_bug.cgi?id=15932
https://bugzilla.lustre.org/attachment.cgi?id=17205
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'arch/parisc/nm')
0 files changed, 0 insertions, 0 deletions