Commit df808180 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

f2fs: Convert f2fs_grab_cache_page() to use scoped memory APIs 



Prevent GFP_FS allocations by using memalloc_nofs_save() instead
of AOP_FLAG_NOFS.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 2d878178

fs/f2fs/f2fs.h

+8 −1
Original line number Diff line number Diff line
@@ -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(