diff options
| -rw-r--r-- | sys/sparc64/sparc64/mem.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sys/sparc64/sparc64/mem.c b/sys/sparc64/sparc64/mem.c index b68c384..cb20e6a 100644 --- a/sys/sparc64/sparc64/mem.c +++ b/sys/sparc64/sparc64/mem.c @@ -130,6 +130,7 @@ mmrw(dev_t dev, struct uio *uio, int flags) struct iovec *iov; int error = 0; vm_offset_t addr, eaddr, o, v = 0; + vm_prot_t prot; vm_size_t c = 0; u_long asi; char *buf = NULL; @@ -198,12 +199,12 @@ mmrw(dev_t dev, struct uio *uio, int flags) if (pmap_extract(kernel_pmap, addr) == 0) return EFAULT; - if (!kernacc((caddr_t)uio->uio_offset, c, - uio->uio_rw == UIO_READ ? - VM_PROT_READ : VM_PROT_WRITE)) { - return (EFAULT); - } + prot = (uio->uio_rw == UIO_READ) ? VM_PROT_READ : + VM_PROT_WRITE; v = uio->uio_offset; + if (v < VM_MIN_DIRECT_ADDRESS && + kernacc((caddr_t)v, c, prot) == FALSE) + return (EFAULT); error = uiomove((caddr_t)v, c, uio); if (uio->uio_rw == UIO_WRITE) icache_flush(v, v + c); |
