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btrfs: Implement set_extent_bits_nowait 

It will be used in a future patch that will require modifying an
extent_io_tree struct under a spinlock.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.2
Nikolay Borisov 2019-03-27 14:24:10 +02:00 committed by David Sterba
parent 930b090729
commit 4ca7365606
2 changed files with 9 additions and 0 deletions
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7
fs/btrfs/extent_io.c
View File

@ -1368,6 +1368,13 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
changeset);
}
int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits)
{
return __set_extent_bit(tree, start, end, bits, 0, NULL, NULL,
GFP_NOWAIT, NULL);
}
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, int wake, int delete,
struct extent_state **cached)

2
fs/btrfs/extent_io.h
View File

@ -328,6 +328,8 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask);
int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits);
static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
u64 end, unsigned bits)