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bread() is a special case of breadn(), so don't replicate code.

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phk 2001-04-18 07:16:07 +00:00
parent 60035bdf1f
commit 11bb4116b3
1 changed files with 2 additions and 23 deletions
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25
sys/kern/vfs_bio.c
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@ -502,35 +502,14 @@ bremfree(struct buf * bp)
* Get a buffer with the specified data. Look in the cache first. We * Get a buffer with the specified data. Look in the cache first. We
* must clear BIO_ERROR and B_INVAL prior to initiating I/O. If B_CACHE * must clear BIO_ERROR and B_INVAL prior to initiating I/O. If B_CACHE
* is set, the buffer is valid and we do not have to do anything ( see * is set, the buffer is valid and we do not have to do anything ( see
* getblk() ). * getblk() ). This is really just a special case of breadn().
*/ */
int int
bread(struct vnode * vp, daddr_t blkno, int size, struct ucred * cred, bread(struct vnode * vp, daddr_t blkno, int size, struct ucred * cred,
struct buf ** bpp) struct buf ** bpp)
{ {
struct buf *bp;
bp = getblk(vp, blkno, size, 0, 0); return (breadn(vp, blkno, size, 0, 0, 0, cred, bpp));
*bpp = bp;
/* if not found in cache, do some I/O */
if ((bp->b_flags & B_CACHE) == 0) {
if (curproc != PCPU_GET(idleproc))
curproc->p_stats->p_ru.ru_inblock++;
KASSERT(!(bp->b_flags & B_ASYNC), ("bread: illegal async bp %p", bp));
bp->b_iocmd = BIO_READ;
bp->b_flags &= ~B_INVAL;
bp->b_ioflags &= ~BIO_ERROR;
if (bp->b_rcred == NOCRED) {
if (cred != NOCRED)
crhold(cred);
bp->b_rcred = cred;
}
vfs_busy_pages(bp, 0);
VOP_STRATEGY(vp, bp);
return (bufwait(bp));
}
return (0);
} }
/* /*