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authorBrian Gerst <brgerst@gmail.com>2009-01-19 00:38:59 +0900
committerTejun Heo <tj@kernel.org>2009-01-19 00:38:59 +0900
commitc2558e0eba66b49993e619da66c95a50a97830a3 (patch)
tree06c24e7ec0ab114da24e41e0b2107bb0cfe2d04e
parente7a22c1ebcc1caa8178df1819d05128bb5b45ab9 (diff)
x86-64: Move isidle from PDA to per-cpu.
tj: s/isidle/is_idle/ Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
-rw-r--r--arch/x86/include/asm/pda.h1
-rw-r--r--arch/x86/kernel/process_64.c5
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h
index b30ef6bddc43..c31ca048a901 100644
--- a/arch/x86/include/asm/pda.h
+++ b/arch/x86/include/asm/pda.h
@@ -23,7 +23,6 @@ struct x8664_pda {
offset 40!!! */
#endif
short in_bootmem; /* pda lives in bootmem */
- short isidle;
} ____cacheline_aligned_in_smp;
DECLARE_PER_CPU(struct x8664_pda, __pda);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 480128918926..4523ff88a69d 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -61,6 +61,7 @@ DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
DEFINE_PER_CPU(unsigned long, old_rsp);
+static DEFINE_PER_CPU(unsigned char, is_idle);
unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
@@ -80,13 +81,13 @@ EXPORT_SYMBOL_GPL(idle_notifier_unregister);
void enter_idle(void)
{
- write_pda(isidle, 1);
+ percpu_write(is_idle, 1);
atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
}
static void __exit_idle(void)
{
- if (test_and_clear_bit_pda(0, isidle) == 0)
+ if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
}