Messages in this thread Patch in this message | | | From | "Nicholas A. Bellinger" <> | Subject | [PATCH 1/2] kernel.h: Add DIV_ROUND_UP_ULL usage | Date | Tue, 26 Jul 2011 07:10:24 +0000 |
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From: Nicholas Bellinger <nab@linux-iscsi.org>
Add new DIV_ROUND_UP_ULL macro usage for 32-bit architectures requiring unsigned long long division of sectors * dev_max_sectors.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org> --- include/linux/kernel.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 953352a..016dcc9 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -56,6 +56,8 @@ #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) +#define DIV_ROUND_UP_ULL(ll,d) \ + ({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; }) /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */ #define roundup(x, y) ( \ -- 1.7.2.5
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