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Fix an expression parenthesization typo in a conditional. It should not

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have any operational effects other then to make the code in question
     a little faster.  Also added a more involved comment.
This commit is contained in:
dillon 1999-01-23 06:36:15 +00:00
parent 3a81644d73
commit fcfddd9dee
1 changed files with 10 additions and 2 deletions
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12
sys/kern/vfs_bio.c
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@ -11,7 +11,7 @@
* 2. Absolutely no warranty of function or purpose is made by the author
* John S. Dyson.
*
* $Id: vfs_bio.c,v 1.195 1999/01/21 09:19:33 dillon Exp $
* $Id: vfs_bio.c,v 1.196 1999/01/22 08:59:05 dg Exp $
*/
/*
@ -1473,8 +1473,16 @@ getblk(struct vnode * vp, daddr_t blkno, int size, int slpflag, int slptimeo)
* contain fully valid pages. Normal (old-style) buffers
* should be fully valid. This might also lead to B_CACHE
* getting clear.
*
* If B_CACHE is already clear, don't bother checking to see
* if we have to clear it again.
*
* XXX this code should not be necessary unless the B_CACHE
* handling is broken elsewhere in the kernel. We need to
* check the cases and then turn the clearing part of this
* code into a panic.
*/
if ((bp->b_flags & B_VMIO|B_CACHE) == (B_VMIO|B_CACHE)) {
if ((bp->b_flags & (B_VMIO|B_CACHE)) == (B_VMIO|B_CACHE)) {
int checksize = bp->b_bufsize;
int poffset = bp->b_offset & PAGE_MASK;
int resid;