[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@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 7c3fc76..98b0faf 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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