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Index: sys/kern/vfs_aio.c
===================================================================
--- sys/kern/vfs_aio.c
+++ sys/kern/vfs_aio.c
@@ -1173,7 +1173,7 @@
struct cdevsw *csw;
struct cdev *dev;
struct kaioinfo *ki;
- int error, ref, unmap, poff;
+ int error, ref, poff;
vm_prot_t prot;
cb = &job->uaiocb;
@@ -1206,12 +1206,13 @@
ki = p->p_aioinfo;
poff = (vm_offset_t)cb->aio_buf & PAGE_MASK;
- unmap = ((dev->si_flags & SI_UNMAPPED) && unmapped_buf_allowed);
- if (unmap) {
+ if ((dev->si_flags & SI_UNMAPPED) && unmapped_buf_allowed) {
if (cb->aio_nbytes > MAXPHYS) {
error = -1;
goto unref;
}
+
+ pbuf = NULL;
} else {
if (cb->aio_nbytes > MAXPHYS - poff) {
error = -1;
@@ -1221,18 +1222,14 @@
error = -1;
goto unref;
}
- }
- job->bp = bp = g_alloc_bio();
- if (!unmap) {
+
job->pbuf = pbuf = (struct buf *)getpbuf(NULL);
BUF_KERNPROC(pbuf);
- } else
- pbuf = NULL;
-
- AIO_LOCK(ki);
- if (!unmap)
+ AIO_LOCK(ki);
ki->kaio_buffer_count++;
- AIO_UNLOCK(ki);
+ AIO_UNLOCK(ki);
+ }
+ job->bp = bp = g_alloc_bio();
bp->bio_length = cb->aio_nbytes;
bp->bio_bcount = cb->aio_nbytes;
@@ -1246,17 +1243,18 @@
prot = VM_PROT_READ;
if (cb->aio_lio_opcode == LIO_READ)
prot |= VM_PROT_WRITE; /* Less backwards than it looks */
- if ((job->npages = vm_fault_quick_hold_pages(
- &curproc->p_vmspace->vm_map,
+ job->npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map,
(vm_offset_t)bp->bio_data, bp->bio_length, prot, job->pages,
- sizeof(job->pages)/sizeof(job->pages[0]))) < 0) {
+ nitems(job->pages));
+ if (job->npages < 0) {
error = EFAULT;
goto doerror;
}
- if (!unmap) {
+ if (pbuf != NULL) {
pmap_qenter((vm_offset_t)pbuf->b_data,
job->pages, job->npages);
bp->bio_data = pbuf->b_data + poff;
+ atomic_add_int(&num_buf_aio, 1);
} else {
bp->bio_ma = job->pages;
bp->bio_ma_n = job->npages;
@@ -1265,20 +1263,16 @@
bp->bio_flags |= BIO_UNMAPPED;
}
- if (!unmap)
- atomic_add_int(&num_buf_aio, 1);
-
/* Perform transfer. */
csw->d_strategy(bp);
dev_relthread(dev, ref);
return (0);
doerror:
- AIO_LOCK(ki);
- if (!unmap)
+ if (pbuf != NULL) {
+ AIO_LOCK(ki);
ki->kaio_buffer_count--;
- AIO_UNLOCK(ki);
- if (pbuf) {
+ AIO_UNLOCK(ki);
relpbuf(pbuf, NULL);
job->pbuf = NULL;
}

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