diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-07-06 07:48:14 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-07-11 23:14:16 +0200 |
| commit | 5a8d1f60b2505cf2ee116ac38e54e65b757a1773 (patch) | |
| tree | a6dfea313d92b1f56a1ee64a971587855a084c13 | |
| parent | a27c78fddbbafcace558368a92f9b9fdaeee8b5c (diff) | |
fs/fat: reduce data size for FAT_WRITE
Allocated tmpbuf_cluster dynamically to reduce the data size added by
compiling with CONFIG_FAT_WRITE.
Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
| -rw-r--r-- | fs/fat/fat_write.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c index b16a39d3ff..a2682b5f46 100644 --- a/fs/fat/fat_write.c +++ b/fs/fat/fat_write.c @@ -500,8 +500,6 @@ flush_dir(fat_itr *itr) nsects * mydata->sect_size); } -static __u8 tmpbuf_cluster[MAX_CLUSTSIZE] __aligned(ARCH_DMA_MINALIGN); - /* * Read and modify data on existing and consecutive cluster blocks */ @@ -509,6 +507,7 @@ static int get_set_cluster(fsdata *mydata, __u32 clustnum, loff_t pos, __u8 *buffer, loff_t size, loff_t *gotsize) { + static u8 *tmpbuf_cluster; unsigned int bytesperclust = mydata->clust_size * mydata->sect_size; __u32 startsect; loff_t wsize; @@ -518,6 +517,12 @@ get_set_cluster(fsdata *mydata, __u32 clustnum, loff_t pos, __u8 *buffer, if (!size) return 0; + if (!tmpbuf_cluster) { + tmpbuf_cluster = memalign(ARCH_DMA_MINALIGN, MAX_CLUSTSIZE); + if (!tmpbuf_cluster) + return -1; + } + assert(pos < bytesperclust); startsect = clust_to_sect(mydata, clustnum); |