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| author | Frans Kaashoek <[email protected]> | 2019-07-30 08:54:43 -0400 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2019-07-30 08:54:43 -0400 |
| commit | f37a3e396454268074f48517e3773f099846d0e3 (patch) | |
| tree | c0885b4e2009f26fe13046137008bfdfd69648c4 /kernel/bio.c | |
| parent | f1bb53c690051994f5a2c43ee900f9e335bd019c (diff) | |
| download | xv6-labs-f37a3e396454268074f48517e3773f099846d0e3.tar.gz xv6-labs-f37a3e396454268074f48517e3773f099846d0e3.tar.bz2 xv6-labs-f37a3e396454268074f48517e3773f099846d0e3.zip | |
Make pin/unpin explicit
Diffstat (limited to 'kernel/bio.c')
| -rw-r--r-- | kernel/bio.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/bio.c b/kernel/bio.c index 7455c06..a1074f2 100644 --- a/kernel/bio.c +++ b/kernel/bio.c @@ -133,3 +133,19 @@ brelse(struct buf *b) release(&bcache.lock); } + +void +bpin(struct buf *b) { + acquire(&bcache.lock); + b->refcnt++; + release(&bcache.lock); +} + +void +bunpin(struct buf *b) { + acquire(&bcache.lock); + b->refcnt--; + release(&bcache.lock); +} + + |