Commit-ID: a7101d152665817bf7cafc47e7f5dcb1f54664fe
Gitweb: http://git.kernel.org/tip/a7101d152665817bf7cafc47e7f5dcb1f54664fe
Author: Jan Beulich <JBeulich@xxxxxxxx>
AuthorDate: Fri, 6 Jul 2012 15:20:35 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 10 Jul 2012 10:38:15 +0200
x86/mm/mtrr: Slightly simplify print_mtrr_state()
high_width can be easily calculated in a single expression when
making use of __ffs64().
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/4FF71053020000780008E1B5@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/cpu/mtrr/generic.c | 6 +-----
1 files changed, 1 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index 75772ae..e9fe907 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -361,11 +361,7 @@ static void __init print_mtrr_state(void)
}
pr_debug("MTRR variable ranges %sabled:\n",
mtrr_state.enabled & 2 ? "en" : "dis");
- if (size_or_mask & 0xffffffffUL)
- high_width = ffs(size_or_mask & 0xffffffffUL) - 1;
- else
- high_width = ffs(size_or_mask>>32) + 32 - 1;
- high_width = (high_width - (32 - PAGE_SHIFT) + 3) / 4;
+ high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4;
for (i = 0; i < num_var_ranges; ++i) {
if (mtrr_state.var_ranges[i].mask_lo & (1 << 11))
--
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