diff options
| author | Jan Kara <jack@suse.cz> | 2018-12-28 00:39:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 12:11:51 -0800 |
| commit | 89cb0888ca1483ad72648844ddd1b801863a8949 (patch) | |
| tree | 63b626652f16c12b700c74eff2527a37d36fab61 /include/linux | |
| parent | 84ade7c15ccfb46f852f4e2469b007a33651904d (diff) | |
mm: migrate: provide buffer_migrate_page_norefs()
Provide a variant of buffer_migrate_page() that also checks whether there
are no unexpected references to buffer heads. This function will then be
safe to use for block device pages.
[akpm@linux-foundation.org: remove EXPORT_SYMBOL(buffer_migrate_page_norefs)]
Link: http://lkml.kernel.org/r/20181211172143.7358-5-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 26a8607b3c3c..1cda6648a41f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3269,8 +3269,12 @@ extern int generic_check_addressable(unsigned, u64); extern int buffer_migrate_page(struct address_space *, struct page *, struct page *, enum migrate_mode); +extern int buffer_migrate_page_norefs(struct address_space *, + struct page *, struct page *, + enum migrate_mode); #else #define buffer_migrate_page NULL +#define buffer_migrate_page_norefs NULL #endif extern int setattr_prepare(struct dentry *, struct iattr *); |