[U-Boot] [PATCH v4 16/29] env: Drop unused env_ptr variables

[Simon Glass]

This variable is declared as a global in most environment location
drivers. But it is not used outside the drivers and most of the
declarations are unnecessary.

Also some drivers call free() on env_ptr which seems wrong since it is
not in the heap.

Drop the variable where possible, and all calls to free().

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Tom Rini <trini at konsulko.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 env/dataflash.c | 2 --
 env/eeprom.c    | 4 ----
 env/ext4.c      | 2 --
 env/fat.c       | 2 --
 env/mmc.c       | 6 ------
 env/nowhere.c   | 2 --
 env/nvram.c     | 1 -
 env/ubi.c       | 2 --
 8 files changed, 21 deletions(-)

diff --git a/env/dataflash.c b/env/dataflash.c
index 9421a6a5b2..28dcf6fa1c 100644
--- a/env/dataflash.c
+++ b/env/dataflash.c
@@ -14,8 +14,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-env_t *env_ptr;
-
 static unsigned char env_dataflash_get_char(int index)
 {
 	uchar c;
diff --git a/env/eeprom.c b/env/eeprom.c
index 2c795b9236..39adccabbe 100644
--- a/env/eeprom.c
+++ b/env/eeprom.c
@@ -21,8 +21,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-env_t *env_ptr;
-
 static int eeprom_bus_read(unsigned dev_addr, unsigned offset,
 			   uchar *buffer, unsigned cnt)
 {
@@ -196,8 +194,6 @@ static int env_eeprom_save(void)
 	char flag_obsolete	= OBSOLETE_FLAG;
 #endif
 
-	BUG_ON(env_ptr != NULL);
-
 	rc = env_export(&env_new);
 	if (rc)
 		return rc;
diff --git a/env/ext4.c b/env/ext4.c
index 5acdf0eda0..ee073a8b7c 100644
--- a/env/ext4.c
+++ b/env/ext4.c
@@ -31,8 +31,6 @@
 #include <ext4fs.h>
 #include <mmc.h>
 
-env_t *env_ptr;
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_CMD_SAVEENV
diff --git a/env/fat.c b/env/fat.c
index ad0c4321c7..69319f8834 100644
--- a/env/fat.c
+++ b/env/fat.c
@@ -31,8 +31,6 @@
 # endif
 #endif
 
-env_t *env_ptr;
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CMD_SAVEENV
diff --git a/env/mmc.c b/env/mmc.c
index 18da6dc58c..88ffc91f0b 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -23,12 +23,6 @@
 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
 #endif
 
-#ifdef ENV_IS_EMBEDDED
-env_t *env_ptr = &environment;
-#else /* ! ENV_IS_EMBEDDED */
-env_t *env_ptr;
-#endif /* ENV_IS_EMBEDDED */
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #if !defined(CONFIG_ENV_OFFSET)
diff --git a/env/nowhere.c b/env/nowhere.c
index 1a17d6978b..d60de494e6 100644
--- a/env/nowhere.c
+++ b/env/nowhere.c
@@ -15,8 +15,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-env_t *env_ptr;
-
 U_BOOT_ENV_LOCATION(nowhere) = {
 	.location	= ENVL_NOWHERE,
 	ENV_NAME("nowhere")
diff --git a/env/nvram.c b/env/nvram.c
index 0f4b491fd3..ac389ace62 100644
--- a/env/nvram.c
+++ b/env/nvram.c
@@ -36,7 +36,6 @@ DECLARE_GLOBAL_DATA_PTR;
 #ifdef CONFIG_SYS_NVRAM_ACCESS_ROUTINE
 extern void *nvram_read(void *dest, const long src, size_t count);
 extern void nvram_write(long dest, const void *src, size_t count);
-env_t *env_ptr;
 #else
 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
 #endif
diff --git a/env/ubi.c b/env/ubi.c
index 4d5ae1343d..9399f943dc 100644
--- a/env/ubi.c
+++ b/env/ubi.c
@@ -16,8 +16,6 @@
 #include <ubi_uboot.h>
 #undef crc32
 
-env_t *env_ptr;
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_CMD_SAVEENV
-- 
2.14.0.rc0.400.g1c36432dff-goog