nfs/blocklayout: Fix compilation error (make W=1) in bl_write_pagelist()

[ Upstream commit f83c8dd ]

Clang compiler is not happy about set but unused variable
(when dprintk() is no-op):

.../blocklayout/blocklayout.c:384:9: error: variable 'count' set but not used [-Werror,-Wunused-but-set-variable]

Remove a leftover from the previous cleanup.

Fixes: 3a6fd1f ("pnfs/blocklayout: remove read-modify-write handling in bl_write_pagelist")
Acked-by: Anna Schumaker <anna.schumkaer@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: andy-shev

fs/nfs/blocklayout/blocklayout.c

@@ -381,14 +381,13 @@ bl_write_pagelist(struct nfs_pgio_header *header, int sync)
 	sector_t isect, extent_length = 0;
 	struct parallel_io *par = NULL;
 	loff_t offset = header->args.offset;
-	size_t count = header->args.count;
 	struct page **pages = header->args.pages;
 	int pg_index = header->args.pgbase >> PAGE_SHIFT;
 	unsigned int pg_len;
 	struct blk_plug plug;
 	int i;
 
-	dprintk("%s enter, %zu@%lld\n", __func__, count, offset);
+	dprintk("%s enter, %u@%lld\n", __func__, header->args.count, offset);
 
 	/* At this point, header->page_aray is a (sequential) list of nfs_pages.
 	 * We want to write each, and if there is an error set pnfs_error
@@ -429,7 +428,6 @@ bl_write_pagelist(struct nfs_pgio_header *header, int sync)
 		}
 
 		offset += pg_len;
-		count -= pg_len;
 		isect += (pg_len >> SECTOR_SHIFT);
 		extent_length -= (pg_len >> SECTOR_SHIFT);
 	}