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bcache: add a comment

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This commit is contained in:
Joe Thornber 2018-05-03 09:14:59 +01:00
parent 90d0ff6636
commit 65912ce44d
1 changed files with 7 additions and 7 deletions
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14
lib/device/bcache.h
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@ -150,18 +150,18 @@ bool bcache_invalidate(struct bcache *cache, int fd, block_address index);
*/
bool bcache_invalidate_fd(struct bcache *cache, int fd);
/*
* Prefetches the blocks neccessary to satisfy a byte range.
*/
//----------------------------------------------------------------
// The next four functions are utilities written in terms of the above api.
// Prefetches the blocks neccessary to satisfy a byte range.
void bcache_prefetch_bytes(struct bcache *cache, int fd, off_t start, size_t len);
/*
* Reads and writes the bytes. Returns false if errors occur.
*/
// Reads, writes and zeroes bytes. Returns false if errors occur.
bool bcache_read_bytes(struct bcache *cache, int fd, off_t start, size_t len, void *data);
bool bcache_write_bytes(struct bcache *cache, int fd, off_t start, size_t len, void *data);
bool bcache_write_zeros(struct bcache *cache, int fd, off_t start, size_t len);
/*----------------------------------------------------------------*/
//----------------------------------------------------------------
#endif