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-rw-r--r--mkfs.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/mkfs.c b/mkfs.c
index c09cbd31..4f51a81a 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1091,23 +1091,20 @@ static u64 size_sourcedir(char *dir_name, u64 sectorsize,
static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
{
- int len = sectorsize;
- int loop_num = size / sectorsize;
+ int loop_num;
u64 location = 0;
- char *buf = malloc(len);
+ char buf[4096];
int ret = 0, i;
ssize_t written;
- if (!buf)
- return -ENOMEM;
- memset(buf, 0, len);
+ memset(buf, 0, 4096);
+ loop_num = size / 4096;
for (i = 0; i < loop_num; i++) {
- written = pwrite64(out_fd, buf, len, location);
- if (written != len)
+ written = pwrite64(out_fd, buf, 4096, location);
+ if (written != 4096)
ret = -EIO;
- location += sectorsize;
+ location += 4096;
}
- free(buf);
return ret;
}