Prevent GFP_FS allocations by using memalloc_nofs_save() instead
of AOP_FLAG_NOFS.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
fs/f2fs/f2fs.h | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 8c570de21ed5..74929ade4b5e 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -18,6 +18,7 @@
#include <linux/kobject.h>
#include <linux/sched.h>
#include <linux/cred.h>
+#include <linux/sched/mm.h>
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
@@ -2654,6 +2655,7 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
pgoff_t index, bool for_write)
{
struct page *page;
+ unsigned int flags;
if (IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) {
if (!for_write)
@@ -2673,7 +2675,12 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
if (!for_write)
return grab_cache_page(mapping, index);
- return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
+
+ flags = memalloc_nofs_save();
+ page = grab_cache_page_write_begin(mapping, index, 0);
+ memalloc_nofs_restore(flags);
+
+ return page;
}
static inline struct page *f2fs_pagecache_get_page(
--
2.34.1
