[MTD] partitioning utility predicates

[Linux-MTD Mailing List]

Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=a4b6d516a6079c6ba8dc97d185371439035a35d0
Commit:     a4b6d516a6079c6ba8dc97d185371439035a35d0
Parent:     7ed8c7d440d497913a2218831a67b5897e0e86e1
Author:     David Brownell <dbrownell at users.sourceforge.net>
AuthorDate: Wed Mar 4 12:01:41 2009 -0800
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Fri Mar 20 13:16:44 2009 +0000

    [MTD] partitioning utility predicates
    
    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().
    
    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.
    
    Signed-off-by: David Brownell <dbrownell at users.sourceforge.net>
    Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 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(-)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 7c3fc76..98b0faf 100644
--- 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 spi_device *spi)
 		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;
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index 6d9f810..d95f74a 100644
--- 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, char *name,
 		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;
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 4034ac9..81f7ecd 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -38,19 +38,6 @@
 #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,
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index a45dd83..7535a74 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -76,4 +76,16 @@ int __devinit of_mtd_parse_partitions(struct device *dev,
                                       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