btrfs: use memparse

Use memparse() instead of its own private implementation.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: linux-btrfs@vger.kernel.org
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 28 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index ff3dd55f294d..9ac612e6ca60 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -96,31 +96,6 @@ static match_table_t tokens = {
         {Opt_err, NULL},
 };
 
-u64 btrfs_parse_size(char *str)
-{
-        u64 res;
-        int mult = 1;
-        char *end;
-        char last;
-
-        res = simple_strtoul(str, &end, 10);
-
-        last = end[0];
-        if (isalpha(last)) {
-                last = tolower(last);
-                switch (last) {
-                case 'g':
-                        mult *= 1024;
-                case 'm':
-                        mult *= 1024;
-                case 'k':
-                        mult *= 1024;
-                }
-                res = res * mult;
-        }
-        return res;
-}
-
 /*
  * Regular mount options parser.  Everything that is needed only when
  * reading in a new superblock is parsed here.
@@ -216,7 +191,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                 case Opt_max_extent:
                         num = match_strdup(&args[0]);
                         if (num) {
-                                info->max_extent = btrfs_parse_size(num);
+                                info->max_extent = memparse(num, NULL);
                                 kfree(num);
 
                                 info->max_extent = max_t(u64,
@@ -228,7 +203,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                 case Opt_max_inline:
                         num = match_strdup(&args[0]);
                         if (num) {
-                                info->max_inline = btrfs_parse_size(num);
+                                info->max_inline = memparse(num, NULL);
                                 kfree(num);
 
                                 if (info->max_inline) {
@@ -243,7 +218,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                 case Opt_alloc_start:
                         num = match_strdup(&args[0]);
                         if (num) {
-                                info->alloc_start = btrfs_parse_size(num);
+                                info->alloc_start = memparse(num, NULL);
                                 kfree(num);
                                 printk(KERN_INFO
                                         "btrfs: allocations start at %llu\n",