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>
This commit is contained in:
parent
a27c78fddb
commit
5a8d1f60b2
@ -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);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user