The madvise_behavior() function converts -ENOMEM to -EAGAIN in several
places using identical code.
Move that code to a common error handling path.
No functional changes.
Signed-off-by: Mike Rapoport <r...@linux.ibm.com>
---
mm/madvise.c | 52 ++++++++++++++++------------------------------------
1 file changed, 16 insertions(+), 36 deletions(-)
diff --git a/mm/madvise.c b/mm/madvise.c
index 968df3a..55d78fd 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -105,28 +105,14 @@ static long madvise_behavior(struct vm_area_struct *vma,
case MADV_MERGEABLE:
case MADV_UNMERGEABLE:
error = ksm_madvise(vma, start, end, behavior, &new_flags);
- if (error) {
- /*
- * madvise() returns EAGAIN if kernel resources, such as
- * slab, are temporarily unavailable.
- */
- if (error == -ENOMEM)
- error = -EAGAIN;
- goto out;
- }
+ if (error)
+ goto out_convert_errno;
break;
case MADV_HUGEPAGE:
case MADV_NOHUGEPAGE:
error = hugepage_madvise(vma, &new_flags, behavior);
- if (error) {
- /*
- * madvise() returns EAGAIN if kernel resources, such as
- * slab, are temporarily unavailable.
- */
- if (error == -ENOMEM)
- error = -EAGAIN;
- goto out;
- }
+ if (error)
+ goto out_convert_errno;
break;
}
@@ -152,15 +138,8 @@ static long madvise_behavior(struct vm_area_struct *vma,
goto out;
}
error = __split_vma(mm, vma, start, 1);
- if (error) {
- /*
- * madvise() returns EAGAIN if kernel resources, such as
- * slab, are temporarily unavailable.
- */
- if (error == -ENOMEM)
- error = -EAGAIN;
- goto out;
- }
+ if (error)
+ goto out_convert_errno;
}
if (end != vma->vm_end) {
@@ -169,15 +148,8 @@ static long madvise_behavior(struct vm_area_struct *vma,
goto out;
}
error = __split_vma(mm, vma, end, 0);
- if (error) {
- /*
- * madvise() returns EAGAIN if kernel resources, such as
- * slab, are temporarily unavailable.
- */
- if (error == -ENOMEM)
- error = -EAGAIN;
- goto out;
- }
+ if (error)
+ goto out_convert_errno;
}
success:
@@ -185,6 +157,14 @@ static long madvise_behavior(struct vm_area_struct *vma,
* vm_flags is protected by the mmap_sem held in write mode.
*/
vma->vm_flags = new_flags;
+
+out_convert_errno:
+ /*
+ * madvise() returns EAGAIN if kernel resources, such as
+ * slab, are temporarily unavailable.
+ */
+ if (error == -ENOMEM)
+ error = -EAGAIN;
out:
return error;
}
--
2.7.4
