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fat: fix mm_private when force fallocate

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Change-Id: I4623ff0035ed12755d626b2cba189f2852c84532
Signed-off-by: cliff.chen <cmc@rock-chips.com>
This commit is contained in:
cliff.chen
2017-01-12 14:48:51 +08:00
committed by Huang, Tao
parent 706b704499
commit 2ee5283201
1 changed files with 3 additions and 3 deletions
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6
fs/fat/file.c
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@@ -227,7 +227,7 @@ out:
static long fat_fallocate(struct file *file, int mode,
loff_t offset, loff_t len)
{
int nr_cluster; /* Number of clusters to be allocated */
loff_t nr_cluster, add_cluster; /* Number of clusters to be allocated */
loff_t mm_bytes; /* Number of bytes to be allocated for file */
loff_t ondisksize; /* block aligned on-disk size in bytes*/
struct inode *inode = file->f_mapping->host;
@@ -251,7 +251,7 @@ static long fat_fallocate(struct file *file, int mode,
/* First compute the number of clusters to be allocated */
mm_bytes = offset + len - ondisksize;
nr_cluster = (mm_bytes + (sbi->cluster_size - 1)) >>
add_cluster = nr_cluster = (mm_bytes + (sbi->cluster_size - 1)) >>
sbi->cluster_bits;
/* Start the allocation.We are not zeroing out the clusters */
@@ -263,7 +263,7 @@ static long fat_fallocate(struct file *file, int mode,
if (sbi->options.force_fallocate) {
i_size_write(inode, offset + len);
MSDOS_I(inode)->mmu_private += nr_cluster << sbi->cluster_bits;
MSDOS_I(inode)->mmu_private += add_cluster << sbi->cluster_bits;
}
} else {
if ((offset + len) <= i_size_read(inode))