diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/elevator.c | 3 | ||||
| -rw-r--r-- | block/ll_rw_blk.c | 25 | ||||
| -rw-r--r-- | block/scsi_ioctl.c | 13 |
3 files changed, 10 insertions, 31 deletions
diff --git a/block/elevator.c b/block/elevator.c index 39dcccc..99a4d7b 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -64,7 +64,7 @@ inline int elv_rq_merge_ok(struct request *rq, struct bio *bio) } EXPORT_SYMBOL(elv_rq_merge_ok); -inline int elv_try_merge(struct request *__rq, struct bio *bio) +static inline int elv_try_merge(struct request *__rq, struct bio *bio) { int ret = ELEVATOR_NO_MERGE; @@ -80,7 +80,6 @@ inline int elv_try_merge(struct request *__rq, struct bio *bio) return ret; } -EXPORT_SYMBOL(elv_try_merge); static struct elevator_type *elevator_find(const char *name) { diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 8e13645..8e27d0a 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -26,7 +26,6 @@ #include <linux/slab.h> #include <linux/swap.h> #include <linux/writeback.h> -#include <linux/blkdev.h> #include <linux/interrupt.h> #include <linux/cpu.h> @@ -2748,30 +2747,6 @@ static inline int attempt_front_merge(request_queue_t *q, struct request *rq) return 0; } -/** - * blk_attempt_remerge - attempt to remerge active head with next request - * @q: The &request_queue_t belonging to the device - * @rq: The head request (usually) - * - * Description: - * For head-active devices, the queue can easily be unplugged so quickly - * that proper merging is not done on the front request. This may hurt - * performance greatly for some devices. The block layer cannot safely - * do merging on that first request for these queues, but the driver can - * call this function and make it happen any way. Only the driver knows - * when it is safe to do so. - **/ -void blk_attempt_remerge(request_queue_t *q, struct request *rq) -{ - unsigned long flags; - - spin_lock_irqsave(q->queue_lock, flags); - attempt_back_merge(q, rq); - spin_unlock_irqrestore(q->queue_lock, flags); -} - -EXPORT_SYMBOL(blk_attempt_remerge); - static void init_request_from_bio(struct request *req, struct bio *bio) { req->flags |= REQ_CMD; diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index c2ac36d..18de84c 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -190,16 +190,21 @@ static int verify_command(struct file *file, unsigned char *cmd) safe_for_write(GPCMD_SET_STREAMING), }; unsigned char type = cmd_type[cmd[0]]; + int has_write_perm = 0; /* Anybody who can open the device can do a read-safe command */ if (type & CMD_READ_SAFE) return 0; + /* + * file can be NULL from ioctl_by_bdev()... + */ + if (file) + has_write_perm = file->f_mode & FMODE_WRITE; + /* Write-safe commands just require a writable open.. */ - if (type & CMD_WRITE_SAFE) { - if (file->f_mode & FMODE_WRITE) - return 0; - } + if ((type & CMD_WRITE_SAFE) && has_write_perm) + return 0; /* And root can do any command.. */ if (capable(CAP_SYS_RAWIO)) |