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authorGraf Yang <graf.yang@analog.com>2010-02-01 06:07:50 +0000
committerMike Frysinger <vapier@gentoo.org>2010-03-09 00:30:50 -0500
commit718340f62900ed44046d2b0f74d0dec7cf844194 (patch)
tree974cf52038196598c653902de3da83ca96ee3792 /arch/blackfin/mach-common
parent6c2b7072a7035837998da38809f98e4182e4c41c (diff)
downloadop-kernel-dev-718340f62900ed44046d2b0f74d0dec7cf844194.zip
op-kernel-dev-718340f62900ed44046d2b0f74d0dec7cf844194.tar.gz
Blackfin: rewrite resync_core_{i,d}cache() SMP logic to avoid per_cpu data
This functions are implicitly called by core functions like cpu_relax(), and since those functions may be called early on before common code has initialized the per-cpu data area, we need to tweak the stats gathering. Now the statistics are maintained in common bss which makes these funcs safe to use as soon as the C runtime env is setup. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/mach-common')
-rw-r--r--arch/blackfin/mach-common/smp.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index efc47ff..7803f22 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -474,24 +474,26 @@ void smp_icache_flush_range_others(unsigned long start, unsigned long end)
EXPORT_SYMBOL_GPL(smp_icache_flush_range_others);
#ifdef __ARCH_SYNC_CORE_ICACHE
+unsigned long icache_invld_count[NR_CPUS];
void resync_core_icache(void)
{
unsigned int cpu = get_cpu();
blackfin_invalidate_entire_icache();
- ++per_cpu(cpu_data, cpu).icache_invld_count;
+ icache_invld_count[cpu]++;
put_cpu();
}
EXPORT_SYMBOL(resync_core_icache);
#endif
#ifdef __ARCH_SYNC_CORE_DCACHE
+unsigned long dcache_invld_count[NR_CPUS];
unsigned long barrier_mask __attribute__ ((__section__(".l2.bss")));
void resync_core_dcache(void)
{
unsigned int cpu = get_cpu();
blackfin_invalidate_entire_dcache();
- ++per_cpu(cpu_data, cpu).dcache_invld_count;
+ dcache_invld_count[cpu]++;
put_cpu();
}
EXPORT_SYMBOL(resync_core_dcache);
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