diff options
| author | Graf Yang <graf.yang@analog.com> | 2010-02-01 06:07:50 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-03-09 00:30:50 -0500 |
| commit | 718340f62900ed44046d2b0f74d0dec7cf844194 (patch) | |
| tree | 974cf52038196598c653902de3da83ca96ee3792 | |
| parent | 6c2b7072a7035837998da38809f98e4182e4c41c (diff) | |
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>
| -rw-r--r-- | arch/blackfin/include/asm/cpu.h | 2 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/smp.h | 7 | ||||
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 4 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 6 |
4 files changed, 13 insertions, 6 deletions
diff --git a/arch/blackfin/include/asm/cpu.h b/arch/blackfin/include/asm/cpu.h index b191dc662bd..16883e582e3 100644 --- a/arch/blackfin/include/asm/cpu.h +++ b/arch/blackfin/include/asm/cpu.h @@ -17,8 +17,6 @@ struct blackfin_cpudata { struct task_struct *idle; unsigned int imemctl; unsigned int dmemctl; - unsigned long dcache_invld_count; - unsigned long icache_invld_count; }; DECLARE_PER_CPU(struct blackfin_cpudata, cpu_data); diff --git a/arch/blackfin/include/asm/smp.h b/arch/blackfin/include/asm/smp.h index 7f26de09ca9..f5b53796711 100644 --- a/arch/blackfin/include/asm/smp.h +++ b/arch/blackfin/include/asm/smp.h @@ -24,6 +24,13 @@ struct corelock_slot { }; extern struct corelock_slot corelock; +#ifdef __ARCH_SYNC_CORE_ICACHE +extern unsigned long icache_invld_count[NR_CPUS]; +#endif +#ifdef __ARCH_SYNC_CORE_DCACHE +extern unsigned long dcache_invld_count[NR_CPUS]; +#endif + void smp_icache_flush_range_others(unsigned long start, unsigned long end); #ifdef CONFIG_HOTPLUG_CPU diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index b54ba45db5f..8e2efceb364 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -1239,10 +1239,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS, BFIN_DLINES); #ifdef __ARCH_SYNC_CORE_DCACHE - seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", cpudata->dcache_invld_count); + seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", dcache_invld_count[cpu_num]); #endif #ifdef __ARCH_SYNC_CORE_ICACHE - seq_printf(m, "SMP Icache Flushes\t: %lu\n\n", cpudata->icache_invld_count); + seq_printf(m, "SMP Icache Flushes\t: %lu\n\n", icache_invld_count[cpu_num]); #endif if (cpu_num != num_possible_cpus() - 1) diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index efc47ffd066..7803f22d2ca 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); |