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| author | Michal Nazarewicz <mina86@mina86.com> | 2014-06-19 03:58:36 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2014-06-19 22:04:50 -0700 |
| commit | 891715793f0451e5114d200be932ac14ce8521a3 (patch) | |
| tree | a72b0f4acb5f87762a286453cd5e7d1afda4babc /arch/x86 | |
| parent | 7171511eaec5bf23fb06078f59784a3a0626b38f (diff) | |
| download | blackbird-op-linux-891715793f0451e5114d200be932ac14ce8521a3.tar.gz blackbird-op-linux-891715793f0451e5114d200be932ac14ce8521a3.zip | |
x86/tsc: Get rid of custom DIV_ROUND() macro
When invoced for positive values, DIV_ROUND macro defined in
arch/x86/kernel/tsc.c behaves exactly like DIV_ROUND_CLOSEST from
include/linux/kernel.h file, so remove the custom macro in favour
of the shared one.
[ hpa: changed line breaks ]
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Link: http://lkml.kernel.org/r/1403143116-21755-1-git-send-email-mina86@mina86.com
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 57e5ce126d5a..8764232bf0f1 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -234,9 +234,6 @@ static inline unsigned long long cycles_2_ns(unsigned long long cyc) return ns; } -/* XXX surely we already have this someplace in the kernel?! */ -#define DIV_ROUND(n, d) (((n) + ((d) / 2)) / (d)) - static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu) { unsigned long long tsc_now, ns_now; @@ -259,7 +256,9 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu) * time function is continuous; see the comment near struct * cyc2ns_data. */ - data->cyc2ns_mul = DIV_ROUND(NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR, cpu_khz); + data->cyc2ns_mul = + DIV_ROUND_CLOSEST(NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR, + cpu_khz); data->cyc2ns_shift = CYC2NS_SCALE_FACTOR; data->cyc2ns_offset = ns_now - mul_u64_u32_shr(tsc_now, data->cyc2ns_mul, CYC2NS_SCALE_FACTOR); |
