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author | rsc <rsc> | 2007-08-27 14:09:30 +0000 |
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committer | rsc <rsc> | 2007-08-27 14:09:30 +0000 |
commit | d003d232fc34d92426aed61af13d3815355c1db8 (patch) | |
tree | 2bdaa3d76a6c0869b186721fd1be9c4f0630dd7f /buf.h | |
parent | efc12b8e616ed3394468c1802da8e1f39e387cd3 (diff) | |
download | xv6-labs-d003d232fc34d92426aed61af13d3815355c1db8.tar.gz xv6-labs-d003d232fc34d92426aed61af13d3815355c1db8.tar.bz2 xv6-labs-d003d232fc34d92426aed61af13d3815355c1db8.zip |
Another attempt at the bio.c comment.
Rename B_WRITE to B_DIRTY and then let ide.c
maintain the B_VALID and B_DIRTY flags.
Diffstat (limited to 'buf.h')
-rw-r--r-- | buf.h | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -5,9 +5,9 @@ struct buf { struct buf *prev; // LRU cache list struct buf *next; struct buf *qnext; // disk queue - int done; uchar data[512]; }; -#define B_BUSY 0x1 // buffer is locked by some process -#define B_VALID 0x2 // buffer contains the data of the sector -#define B_WRITE 0x4 // asking device driver to write, else read +#define B_BUSY 0x1 // buffer is locked by some process +#define B_VALID 0x2 // buffer has been read from disk +#define B_DIRTY 0x4 // buffer needs to be written to disk + |