The patch titled
Subject: mm: use helper function put_write_access()
has been added to the -mm tree. Its filename is
mm-use-helper-function-put_write_access.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-use-helper-function-put_write_access.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-use-helper-function-put_write_access.patch
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm: use helper function put_write_access()
In commit 1da177e4c3f4 ("Linux-2.6.12-rc2"), the helper put_write_access()
came with the atomic_dec operation of the i_writecount field. But it
forgot to use this helper in __vma_link_file() and dup_mmap().
Link: https://lkml.kernel.org/r/20200924115235.5111-1-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/fork.c | 2 +-
mm/mmap.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/fork.c~mm-use-helper-function-put_write_access
+++ a/kernel/fork.c
@@ -555,7 +555,7 @@ static __latent_entropy int dup_mmap(str
get_file(file);
if (tmp->vm_flags & VM_DENYWRITE)
- atomic_dec(&inode->i_writecount);
+ put_write_access(inode);
i_mmap_lock_write(mapping);
if (tmp->vm_flags & VM_SHARED)
mapping_allow_writable(mapping);
--- a/mm/mmap.c~mm-use-helper-function-put_write_access
+++ a/mm/mmap.c
@@ -619,7 +619,7 @@ static void __vma_link_file(struct vm_ar
struct address_space *mapping = file->f_mapping;
if (vma->vm_flags & VM_DENYWRITE)
- atomic_dec(&file_inode(file)->i_writecount);
+ put_write_access(file_inode(file));
if (vma->vm_flags & VM_SHARED)
mapping_allow_writable(mapping);
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-swap-fix-confusing-comment-in-release_pages.patch
mm-memcontrol-correct-the-comment-of-mem_cgroup_iter.patch
mm-page_counter-correct-the-obsolete-func-name-in-the-comment-of-page_counter_try_charge.patch
mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch
mm-use-helper-function-mapping_allow_writable.patch
mm-mmap-use-helper-function-allow_write_access-in-__remove_shared_vm_struct.patch
mm-vmstat-use-helper-macro-abs.patch
mm-fix-some-broken-comments.patch
mm-use-helper-function-put_write_access.patch
mm-migrate-avoid-possible-unnecessary-process-right-check-in-kernel_move_pages.patch
