From: Ross Zwisler <[email protected]> Also fixed a top the initial version [boaz] SQUASHME pmem: Micro optimization the hotpath 002
Signed-off-by: Ross Zwisler <[email protected]> Signed-off-by: Boaz Harrosh <[email protected]> --- drivers/block/pmem.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/block/pmem.c b/drivers/block/pmem.c index 750ffdf..f0f0ba0 100644 --- a/drivers/block/pmem.c +++ b/drivers/block/pmem.c @@ -111,9 +111,25 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, return 0; } +static long pmem_direct_access(struct block_device *bdev, sector_t sector, + void **kaddr, unsigned long *pfn, long size) +{ + struct pmem_device *pmem = bdev->bd_disk->private_data; + size_t offset = sector << 9; + + if (unlikely(!pmem)) + return -ENODEV; + + *kaddr = pmem->virt_addr + offset; + *pfn = (pmem->phys_addr + offset) >> PAGE_SHIFT; + + return pmem->size - offset; +} + static const struct block_device_operations pmem_fops = { .owner = THIS_MODULE, .rw_page = pmem_rw_page, + .direct_access = pmem_direct_access, }; /* Kernel module stuff */ -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
