[patch 2.6.29-rc6-mmotm] MTD: partitioning utility predicates

David Brownell
2009-02-26T23:18:40Z

From: David Brownell <dbrownell@users.sourceforge.net>

Move mtd_has_partitions() and mtd_has_cmdlinepart() inlines from
a DaVinci-specific driver to the <linux/mtd/partitions.h> header.

Use those to eliminate #ifdefs in two drivers which had their
own definitions of mtd_has_partitions().

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
---
Quite a lot of other MTD drivers could benefit from using use one
or both of these to remove #ifdeffery. Maybe some Janitors
would like to help?

drivers/mtd/devices/m25p80.c | 17 ++++++-----------
drivers/mtd/devices/mtd_dataflash.c | 16 ++++++----------
drivers/mtd/nand/davinci_nand.c | 13 -------------
include/linux/mtd/partitions.h | 12 ++++++++++++
4 files changed, 24 insertions(+), 34 deletions(-)

--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -65,12 +65,6 @@
#define FAST_READ_DUMMY_BYTE 0
#endif

-#ifdef CONFIG_MTD_PARTITIONS
-#define mtd_has_partitions() (1)
-#else
-#define mtd_has_partitions() (0)
-#endif
-
/****************************************************************************/

struct m25p {
@@ -708,12 +702,13 @@ static int __devinit m25p_probe(struct s
struct mtd_partition *parts = NULL;
int nr_parts = 0;

-#ifdef CONFIG_MTD_CMDLINE_PARTS
- static const char *part_probes[] = { "cmdlinepart", NULL, };
+ if (mtd_has_cmdlinepart()) {
+ static const char *part_probes[]
+ = { "cmdlinepart", NULL, };

- nr_parts = parse_mtd_partitions(&flash->mtd,
- part_probes, &parts, 0);
-#endif
+ nr_parts = parse_mtd_partitions(&flash->mtd,
+ part_probes, &parts, 0);
+ }

if (nr_parts <= 0 && data && data->parts) {
parts = data->parts;
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -98,12 +98,6 @@ struct dataflash {
struct mtd_info mtd;
};

-#ifdef CONFIG_MTD_PARTITIONS
-#define mtd_has_partitions() (1)
-#else
-#define mtd_has_partitions() (0)
-#endif
-
/* ......................................................................... */

/*
@@ -682,11 +676,13 @@ add_dataflash_otp(struct spi_device *spi
struct mtd_partition *parts;
int nr_parts = 0;

-#ifdef CONFIG_MTD_CMDLINE_PARTS
- static const char *part_probes[] = { "cmdlinepart", NULL, };
+ if (mtd_has_cmdlinepart()) {
+ static const char *part_probes[]
+ = { "cmdlinepart", NULL, };

- nr_parts = parse_mtd_partitions(device, part_probes, &parts, 0);
-#endif
+ nr_parts = parse_mtd_partitions(device,
+ part_probes, &parts, 0);
+ }

if (nr_parts <= 0 && pdata && pdata->parts) {
parts = pdata->parts;
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -39,19 +39,6 @@
#include <asm/mach-types.h>

-#ifdef CONFIG_MTD_PARTITIONS
-static inline int mtd_has_partitions(void) { return 1; }
-#else
-static inline int mtd_has_partitions(void) { return 0; }
-#endif
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-static inline int mtd_has_cmdlinepart(void) { return 1; }
-#else
-static inline int mtd_has_cmdlinepart(void) { return 0; }
-#endif
-
-
/*
* This is a device driver for the NAND flash controller found on the
* various DaVinci family chips. It handles up to four SoC chipselects,
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -76,4 +76,16 @@ int __devinit of_mtd_parse_partitions(st
struct device_node *node,
struct mtd_partition **pparts);

+#ifdef CONFIG_MTD_PARTITIONS
+static inline int mtd_has_partitions(void) { return 1; }
+#else
+static inline int mtd_has_partitions(void) { return 0; }
+#endif
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+static inline int mtd_has_cmdlinepart(void) { return 1; }
+#else
+static inline int mtd_has_cmdlinepart(void) { return 0; }
+#endif
+
#endif