fs: inode: don't use movable allocations

Movable allocation requests can get CMA memory. CMA memory is mapped as non-cached normal memory. f2fs code can perform test_bit operations on the memory allocated, which inturn uses ldr/str exclusive instuctions on ARM. ldr/str exclusive instructions casue unhandled exceptions and kernel panics. [ 6934.858377] Unhandled fault: unknown 53 (0x96000035) at 0xffffffc0699c1000 [ 6934.866608] Internal error: : 96000035 [#1] PREEMPT SMP [ 6934.871883] CPU: 1 PID: 666 Comm: LazyTaskWriterT Tainted: G W 3.10.40-g3bdd559-dirty #39 [ 6934.880975] task: ffffffc06079a040 ti: ffffffc02a7bc000 task.ti: ffffffc02a7bc000 [ 6934.888565] PC is at test_and_clear_bit+0x14/0x40 [ 6934.893304] LR is at f2fs_delete_entry+0xd8/0x28c Bug 1550455 Change-Id: I9645296a052301820063b9737bf06c8c9e059986 Signed-off-by: Krishna Reddy <[email protected]>
flar2 · Sep 25, 2014 · 94f09fd · 94f09fd
1 parent 19eaf84
commit 94f09fd
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diff --git a/fs/buffer.c b/fs/buffer.c
@@ -975,7 +975,7 @@ grow_dev_page(struct block_device *bdev, sector_t block,
 	int ret = 0;		/* Will call free_more_memory() */
 
 	page = find_or_create_page(inode->i_mapping, index,
-		(mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS)|__GFP_MOVABLE);
+		(mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS));
 	if (!page)
 		return ret;
 

diff --git a/fs/inode.c b/fs/inode.c
@@ -164,7 +164,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
 	mapping->a_ops = &empty_aops;
 	mapping->host = inode;
 	mapping->flags = 0;
-	mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
+	mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
 	mapping->private_data = NULL;
 	mapping->backing_dev_info = &default_backing_dev_info;
 	mapping->writeback_index = 0;