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| author | Vinod Koul <vkoul@kernel.org> | 2019-06-28 12:07:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-06-29 16:43:45 +0800 |
| commit | 8f9fab480c7a87b10bb5440b5555f370272a5d59 (patch) | |
| tree | a7980854d30c6713bfc9ca225fb1f79fc6274327 /include/pcmcia | |
| parent | 1a5f439c7c02837d943e528d46501564d4226757 (diff) | |
| download | linux-8f9fab480c7a87b10bb5440b5555f370272a5d59.tar.bz2 | |
linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL
DIV_ROUND_UP_ULL adds the two arguments and then invokes
DIV_ROUND_DOWN_ULL. But on a 32bit system the addition of two 32 bit
values can overflow. DIV_ROUND_DOWN_ULL does it correctly and stashes
the addition into a unsigned long long so cast the result to unsigned
long long here to avoid the overflow condition.
[akpm@linux-foundation.org: DIV_ROUND_UP_ULL must be an rval]
Link: http://lkml.kernel.org/r/20190625100518.30753-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/pcmcia')
0 files changed, 0 insertions, 0 deletions