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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-20 17:30:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-20 17:30:20 -0800 |
| commit | e3de671dd6784e30821e64f67f854b90b4496a68 (patch) | |
| tree | 82cc89b65419ae5f04586075616d2de58312a770 /lib | |
| parent | 71e4634e00119b2fb8dd0da99b3f5ebbb49cc872 (diff) | |
| parent | 040b323b5012b5503561ec7fe15cccd6a4bcaec2 (diff) | |
| download | lwn-e3de671dd6784e30821e64f67f854b90b4496a68.tar.gz lwn-e3de671dd6784e30821e64f67f854b90b4496a68.zip | |
Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann:
"The asm-generic tree this time contains one series from Nicolas Pitre
that makes the optimized do_div() implementation from the ARM
architecture available to all architectures.
This also adds stricter type checking for callers of do_div, which has
uncovered a number of bugs in existing code, and fixes up the ones we
have found"
* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
ARM: asm/div64.h: adjust to generic codde
__div64_32(): make it overridable at compile time
__div64_const32(): abstract out the actual 128-bit cross product code
do_div(): generic optimization for constant divisor on 32-bit machines
div64.h: optimize do_div() for power-of-two constant divisors
mtd/sm_ftl.c: fix wrong do_div() usage
drm/mgag200/mgag200_mode.c: fix wrong do_div() usage
hid-sensor-hub.c: fix wrong do_div() usage
ti/fapll: fix wrong do_div() usage
ti/clkt_dpll: fix wrong do_div() usage
tegra/clk-divider: fix wrong do_div() usage
imx/clk-pllv2: fix wrong do_div() usage
imx/clk-pllv1: fix wrong do_div() usage
nouveau/nvkm/subdev/clk/gk20a.c: fix wrong do_div() usage
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/div64.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/div64.c b/lib/div64.c index 62a698a432bc..7f345259c32f 100644 --- a/lib/div64.c +++ b/lib/div64.c @@ -13,7 +13,8 @@ * * Code generated for this function might be very inefficient * for some CPUs. __div64_32() can be overridden by linking arch-specific - * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S. + * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S + * or by defining a preprocessor macro in arch/include/asm/div64.h. */ #include <linux/export.h> @@ -23,6 +24,7 @@ /* Not needed on 64bit architectures */ #if BITS_PER_LONG == 32 +#ifndef __div64_32 uint32_t __attribute__((weak)) __div64_32(uint64_t *n, uint32_t base) { uint64_t rem = *n; @@ -55,8 +57,8 @@ uint32_t __attribute__((weak)) __div64_32(uint64_t *n, uint32_t base) *n = res; return rem; } - EXPORT_SYMBOL(__div64_32); +#endif #ifndef div_s64_rem s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder) |