The get_locked_pte() conditionally grabs 'ptl' in case of returning
non-NULL. This leads sparse to complain about context imbalance.
Rename and wrap it using __cond_lock() to make sparse happy.
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
---
include/linux/mm.h | 10 +++++++++-
mm/memory.c | 2 +-
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 74949fb..e48616d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1023,7 +1023,15 @@ extern void unregister_shrinker(struct shrinker *);
int vma_wants_writenotify(struct vm_area_struct *vma);
-extern pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl);
+extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
+ spinlock_t **ptl);
+static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr,
+ spinlock_t **ptl)
+{
+ pte_t *ptep;
+ __cond_lock(*ptl, ptep = __get_locked_pte(mm, addr, ptl));
+ return ptep;
+}
#ifdef __PAGETABLE_PUD_FOLDED
static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
diff --git a/mm/memory.c b/mm/memory.c
index 0e18b4d..219b50a 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1590,7 +1590,7 @@ struct page *get_dump_page(unsigned long addr)
}
#endif /* CONFIG_ELF_CORE */
-pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr,
+pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
spinlock_t **ptl)
{
pgd_t * pgd = pgd_offset(mm, addr);
--
1.7.2.2
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