s3c2440-nand-use-iomem.patch
Using chip->IO_ADDR_R/IO_ADDR_W, which is __iomem, prevents the
compiler from needlessly reloading constant data.
Signed-off-by: Werner Almesberger <[EMAIL PROTECTED]>
---
Index: ktrack/drivers/mtd/nand/s3c2410.c
===================================================================
--- ktrack.orig/drivers/mtd/nand/s3c2410.c 2008-11-03 14:05:19.000000000
-0200
+++ ktrack/drivers/mtd/nand/s3c2410.c 2008-11-03 14:06:00.000000000 -0200
@@ -529,8 +529,8 @@
static void s3c2440_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
{
- struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
- readsl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+ struct nand_chip *chip = mtd->priv;
+ readsl(chip->IO_ADDR_R, buf, len >> 2);
}
static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf,
int len)
@@ -541,8 +541,8 @@
static void s3c2440_nand_write_buf(struct mtd_info *mtd, const u_char *buf,
int len)
{
- struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
- writesl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+ struct nand_chip *chip = mtd->priv;
+ writesl(chip->IO_ADDR_W, buf, len >> 2);
}
/* cpufreq driver support */
