[RFC PATCHv3 04/11] dm: Use VMALLOC_TOTAL instead of VMALLCO_END - VMALLOC_START

[Laura Abbott <lauraa@codeaurora.org>]

vmalloc already provides a macro to calculat the total vmalloc size,
VMALLOC_TOTAL. Use it.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 drivers/md/dm-bufio.c |    4 ++--
 drivers/md/dm-stats.c |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 54bdd923..cd677f2 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1736,8 +1736,8 @@ static int __init dm_bufio_init(void)
 	 * Get the size of vmalloc space the same way as VMALLOC_TOTAL
 	 * in fs/proc/internal.h
 	 */
-	if (mem > (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100)
-		mem = (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100;
+	if (mem > VMALLOC_TOTAL * DM_BUFIO_VMALLOC_PERCENT / 100)
+		mem = VMALLOC_TOTAL * DM_BUFIO_VMALLOC_PERCENT / 100;
 #endif
 
 	dm_bufio_default_cache_size = mem;
diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
index 28a9012..378ffb6 100644
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -80,7 +80,7 @@ static bool __check_shared_memory(size_t alloc_size)
 	if (a >> PAGE_SHIFT > totalram_pages / DM_STATS_MEMORY_FACTOR)
 		return false;
 #ifdef CONFIG_MMU
-	if (a > (VMALLOC_END - VMALLOC_START) / DM_STATS_VMALLOC_FACTOR)
+	if (a > VMALLOC_TOTAL / DM_STATS_VMALLOC_FACTOR)
 		return false;
 #endif
 	return true;
-- 
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