The patch titled
synchronize_tsc() fixes
has been added to the -mm tree. Its filename is
synchronize_tsc-fixes.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: synchronize_tsc() fixes
From: Andrew Morton <akpm@xxxxxxxx>
- Make tsc_values[] __initdata
- local `realdelta' appears to want to be 64-bit
- Print the skew for negative skews, as well as for positive ones
- remove dead code
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/i386/kernel/smpboot.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff -puN arch/i386/kernel/smpboot.c~synchronize_tsc-fixes arch/i386/kernel/smpboot.c
--- a/arch/i386/kernel/smpboot.c~synchronize_tsc-fixes
+++ a/arch/i386/kernel/smpboot.c
@@ -215,7 +215,7 @@ valid_k7:
static atomic_t tsc_start_flag = ATOMIC_INIT(0);
static atomic_t tsc_count_start = ATOMIC_INIT(0);
static atomic_t tsc_count_stop = ATOMIC_INIT(0);
-static unsigned long long tsc_values[NR_CPUS];
+static unsigned long long __initdata tsc_values[NR_CPUS];
#define NR_LOOPS 5
@@ -286,7 +286,6 @@ static void __init synchronize_tsc_bp (v
avg = sum;
do_div(avg, num_booting_cpus());
- sum = 0;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_isset(i, cpu_callout_map))
continue;
@@ -297,7 +296,8 @@ static void __init synchronize_tsc_bp (v
* We report bigger than 2 microseconds clock differences.
*/
if (delta > 2*one_usec) {
- long realdelta;
+ long long realdelta;
+
if (!buggy) {
buggy = 1;
printk("\n");
@@ -307,12 +307,10 @@ static void __init synchronize_tsc_bp (v
if (tsc_values[i] < avg)
realdelta = -realdelta;
- if (realdelta > 0)
- printk(KERN_INFO "CPU#%d had %ld usecs TSC "
+ if (realdelta)
+ printk(KERN_INFO "CPU#%d had %Ld usecs TSC "
"skew, fixed it up.\n", i, realdelta);
}
-
- sum += delta;
}
if (!buggy)
printk("passed.\n");
_
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