Applies the counting-based method for monitoring lockless pgtable walks on
addr_to_pfn().
local_irq_{save,restore} is already inside {begin,end}_lockless_pgtbl_walk,
so there is no need to repeat it here.
Signed-off-by: Leonardo Bras <leonardo@xxxxxxxxxxxxx>
---
arch/powerpc/kernel/mce_power.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c
index 1cbf7f1a4e3d..7f888fb6f65c 100644
--- a/arch/powerpc/kernel/mce_power.c
+++ b/arch/powerpc/kernel/mce_power.c
@@ -29,7 +29,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr)
{
pte_t *ptep;
unsigned int shift;
- unsigned long pfn, flags;
+ unsigned long pfn, irq_mask;
struct mm_struct *mm;
if (user_mode(regs))
@@ -37,7 +37,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr)
else
mm = &init_mm;
- local_irq_save(flags);
+ irq_mask = begin_lockless_pgtbl_walk(mm);
ptep = __find_linux_pte(mm->pgd, addr, NULL, &shift);
if (!ptep || pte_special(*ptep)) {
@@ -53,7 +53,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr)
}
out:
- local_irq_restore(flags);
+ end_lockless_pgtbl_walk(mm, irq_mask);
return pfn;
}
--
2.20.1
