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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-17 16:07:43 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-17 16:07:43 +1000 |
| commit | eda485f06d17f98bd58559fb5dd331951ffd1608 (patch) | |
| tree | c76f119e68734932c6751cd14fdd420544da92c3 /include/linux/kernel.h | |
| parent | 6b5e7229bbd59f0cfce7015fd46736fc93d8c8c3 (diff) | |
| parent | 9a5d5bd8480068c5829e3d997ee21dab9b3ed05f (diff) | |
Merge remote-tracking branch 'pci/pci/gavin-window-alignment' into next
Merge Gavin patches from the PCI tree as subsequent powerpc
patches are going to depend on them
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 604382143bcf..594b419b7d20 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -82,10 +82,18 @@ __x - (__x % (y)); \ } \ ) + +/* + * Divide positive or negative dividend by positive divisor and round + * to closest integer. Result is undefined for negative divisors. + */ #define DIV_ROUND_CLOSEST(x, divisor)( \ { \ - typeof(divisor) __divisor = divisor; \ - (((x) + ((__divisor) / 2)) / (__divisor)); \ + typeof(x) __x = x; \ + typeof(divisor) __d = divisor; \ + (((typeof(x))-1) >= 0 || (__x) >= 0) ? \ + (((__x) + ((__d) / 2)) / (__d)) : \ + (((__x) - ((__d) / 2)) / (__d)); \ } \ ) |