x86: replace percpu_xxx funcs with this_cpu_xxx
Since percpu_xxx() serial functions are duplicated with this_cpu_xxx().
Removing percpu_xxx() definition and replacing them by this_cpu_xxx()
in code. There is no function change in this patch, just preparation for
later percpu_xxx serial function removing.
On x86 machine the this_cpu_xxx() serial functions are same as
__this_cpu_xxx() without no unnecessary premmpt enable/disable.
Thanks for Stephen Rothwell, he found and fixed a i386 build error in
the patch.
Also thanks for Andrew Morton, he kept updating the patchset in Linus'
tree.
Signed-off-by: Alex Shi <alex.shi@intel.com>
Acked-by: Christoph Lameter <cl@gentwo.org>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index ab13760..9ce8859 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -241,16 +241,16 @@
static inline void enter_lazy(enum paravirt_lazy_mode mode)
{
- BUG_ON(percpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
+ BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
- percpu_write(paravirt_lazy_mode, mode);
+ this_cpu_write(paravirt_lazy_mode, mode);
}
static void leave_lazy(enum paravirt_lazy_mode mode)
{
- BUG_ON(percpu_read(paravirt_lazy_mode) != mode);
+ BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode);
- percpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
+ this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
}
void paravirt_enter_lazy_mmu(void)
@@ -267,7 +267,7 @@
{
BUG_ON(preemptible());
- if (percpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
+ if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
arch_leave_lazy_mmu_mode();
set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES);
}
@@ -289,7 +289,7 @@
if (in_interrupt())
return PARAVIRT_LAZY_NONE;
- return percpu_read(paravirt_lazy_mode);
+ return this_cpu_read(paravirt_lazy_mode);
}
void arch_flush_lazy_mmu_mode(void)