rename _end to __bss_end__

Currently, _end is used for end of BSS section.  We want _end to mean
end of u-boot image, so we rename _end to __bss_end__ first.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
diff --git a/arch/powerpc/cpu/74xx_7xx/start.S b/arch/powerpc/cpu/74xx_7xx/start.S
index 985e1ce..f6011fc 100644
--- a/arch/powerpc/cpu/74xx_7xx/start.S
+++ b/arch/powerpc/cpu/74xx_7xx/start.S
@@ -77,7 +77,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -722,7 +722,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/74xx_7xx/u-boot.lds b/arch/powerpc/cpu/74xx_7xx/u-boot.lds
index 8429f33..24823cd 100644
--- a/arch/powerpc/cpu/74xx_7xx/u-boot.lds
+++ b/arch/powerpc/cpu/74xx_7xx/u-boot.lds
@@ -87,6 +87,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc512x/start.S b/arch/powerpc/cpu/mpc512x/start.S
index 10557cf..9c2e488 100644
--- a/arch/powerpc/cpu/mpc512x/start.S
+++ b/arch/powerpc/cpu/mpc512x/start.S
@@ -79,7 +79,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -626,7 +626,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc512x/u-boot.lds b/arch/powerpc/cpu/mpc512x/u-boot.lds
index ab9303f..7a4d927 100644
--- a/arch/powerpc/cpu/mpc512x/u-boot.lds
+++ b/arch/powerpc/cpu/mpc512x/u-boot.lds
@@ -82,7 +82,7 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
 ENTRY(_start)
diff --git a/arch/powerpc/cpu/mpc5xx/start.S b/arch/powerpc/cpu/mpc5xx/start.S
index 3dbd23d..cc11c8f 100644
--- a/arch/powerpc/cpu/mpc5xx/start.S
+++ b/arch/powerpc/cpu/mpc5xx/start.S
@@ -70,7 +70,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -466,7 +466,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 	cmplw	0, r3, r4
 	beq	6f
 
diff --git a/arch/powerpc/cpu/mpc5xx/u-boot.lds b/arch/powerpc/cpu/mpc5xx/u-boot.lds
index 69bd7aa..e02b213 100644
--- a/arch/powerpc/cpu/mpc5xx/u-boot.lds
+++ b/arch/powerpc/cpu/mpc5xx/u-boot.lds
@@ -91,7 +91,7 @@
    . = ALIGN(4);
   }
 
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
   . = env_start;
   .ppcenv :
diff --git a/arch/powerpc/cpu/mpc5xxx/start.S b/arch/powerpc/cpu/mpc5xxx/start.S
index 38c0bd7..192aa50 100644
--- a/arch/powerpc/cpu/mpc5xxx/start.S
+++ b/arch/powerpc/cpu/mpc5xxx/start.S
@@ -70,7 +70,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -681,7 +681,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc5xxx/u-boot-customlayout.lds b/arch/powerpc/cpu/mpc5xxx/u-boot-customlayout.lds
index bbf0f16..0c6c54e 100644
--- a/arch/powerpc/cpu/mpc5xxx/u-boot-customlayout.lds
+++ b/arch/powerpc/cpu/mpc5xxx/u-boot-customlayout.lds
@@ -91,6 +91,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc5xxx/u-boot.lds b/arch/powerpc/cpu/mpc5xxx/u-boot.lds
index 7e3b70a..5dcaec1 100644
--- a/arch/powerpc/cpu/mpc5xxx/u-boot.lds
+++ b/arch/powerpc/cpu/mpc5xxx/u-boot.lds
@@ -85,6 +85,6 @@
    *(.sbss*)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc8220/start.S b/arch/powerpc/cpu/mpc8220/start.S
index ca42678..300b35c 100644
--- a/arch/powerpc/cpu/mpc8220/start.S
+++ b/arch/powerpc/cpu/mpc8220/start.S
@@ -69,7 +69,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -654,7 +654,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc8220/u-boot.lds b/arch/powerpc/cpu/mpc8220/u-boot.lds
index 72ff671..39bb42e 100644
--- a/arch/powerpc/cpu/mpc8220/u-boot.lds
+++ b/arch/powerpc/cpu/mpc8220/u-boot.lds
@@ -84,6 +84,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc824x/start.S b/arch/powerpc/cpu/mpc824x/start.S
index 0dd1300..fc4e922 100644
--- a/arch/powerpc/cpu/mpc824x/start.S
+++ b/arch/powerpc/cpu/mpc824x/start.S
@@ -77,7 +77,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 #if defined(CONFIG_FADS)
 	GOT_ENTRY(environment)
@@ -596,7 +596,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc824x/u-boot.lds b/arch/powerpc/cpu/mpc824x/u-boot.lds
index 3b9299c..b30ce76 100644
--- a/arch/powerpc/cpu/mpc824x/u-boot.lds
+++ b/arch/powerpc/cpu/mpc824x/u-boot.lds
@@ -85,6 +85,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc8260/start.S b/arch/powerpc/cpu/mpc8260/start.S
index 255a15e..702546e 100644
--- a/arch/powerpc/cpu/mpc8260/start.S
+++ b/arch/powerpc/cpu/mpc8260/start.S
@@ -70,7 +70,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 #if defined(CONFIG_HYMOD)
 	GOT_ENTRY(environment)
@@ -927,7 +927,7 @@
 	 */
 	lwz	r4,GOT(environment)
 #else
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 #endif
 
 	cmplw	0, r3, r4
diff --git a/arch/powerpc/cpu/mpc8260/u-boot.lds b/arch/powerpc/cpu/mpc8260/u-boot.lds
index c76555e..60b71ec 100644
--- a/arch/powerpc/cpu/mpc8260/u-boot.lds
+++ b/arch/powerpc/cpu/mpc8260/u-boot.lds
@@ -84,6 +84,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc83xx/start.S b/arch/powerpc/cpu/mpc83xx/start.S
index 460ac9a..7e60315 100644
--- a/arch/powerpc/cpu/mpc83xx/start.S
+++ b/arch/powerpc/cpu/mpc83xx/start.S
@@ -72,7 +72,7 @@
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
 	GOT_ENTRY(__bss_start)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 
 #ifndef CONFIG_NAND_SPL
 	GOT_ENTRY(_FIXUP_TABLE_)
@@ -977,7 +977,7 @@
 	 */
 	lwz	r4,GOT(environment)
 #else
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 #endif
 
 	cmplw	0, r3, r4
diff --git a/arch/powerpc/cpu/mpc83xx/u-boot.lds b/arch/powerpc/cpu/mpc83xx/u-boot.lds
index 752a175..2f4b9ad 100644
--- a/arch/powerpc/cpu/mpc83xx/u-boot.lds
+++ b/arch/powerpc/cpu/mpc83xx/u-boot.lds
@@ -83,7 +83,7 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
 ENTRY(_start)
diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S
index fa98af6..5777493 100644
--- a/arch/powerpc/cpu/mpc85xx/start.S
+++ b/arch/powerpc/cpu/mpc85xx/start.S
@@ -66,7 +66,7 @@
 #endif
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -1050,7 +1050,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0,r3,r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds b/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
index fa2088b..04bc731 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
@@ -101,6 +101,6 @@
   } :bss
 
   . = ALIGN(4);
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
index b10e0f9..8410bd7 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
@@ -62,6 +62,6 @@
 		*(.sbss*)
 		*(.bss*)
 	}
-	_end = .;
+	__bss_end__ = .;
 }
 ASSERT(__init_end <= 0xfff00ffc, "NAND bootstrap too big");
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot.lds b/arch/powerpc/cpu/mpc85xx/u-boot.lds
index 506c7f2..efe34b7 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot.lds
@@ -125,6 +125,6 @@
   } :bss
 
   . = ALIGN(4);
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc86xx/start.S b/arch/powerpc/cpu/mpc86xx/start.S
index 4c29de6..3e3c21e 100644
--- a/arch/powerpc/cpu/mpc86xx/start.S
+++ b/arch/powerpc/cpu/mpc86xx/start.S
@@ -66,7 +66,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -740,7 +740,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/mpc86xx/u-boot.lds b/arch/powerpc/cpu/mpc86xx/u-boot.lds
index c550ef5..121e529 100644
--- a/arch/powerpc/cpu/mpc86xx/u-boot.lds
+++ b/arch/powerpc/cpu/mpc86xx/u-boot.lds
@@ -88,6 +88,6 @@
    *(COMMON)
    . = ALIGN(4);
   }
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/cpu/mpc8xx/start.S b/arch/powerpc/cpu/mpc8xx/start.S
index 6a16c26..fe3daa2 100644
--- a/arch/powerpc/cpu/mpc8xx/start.S
+++ b/arch/powerpc/cpu/mpc8xx/start.S
@@ -77,7 +77,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 
@@ -597,7 +597,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	6f
diff --git a/arch/powerpc/cpu/ppc4xx/start.S b/arch/powerpc/cpu/ppc4xx/start.S
index 2218508..b43e22c 100644
--- a/arch/powerpc/cpu/ppc4xx/start.S
+++ b/arch/powerpc/cpu/ppc4xx/start.S
@@ -248,7 +248,7 @@
 	GOT_ENTRY(transfer_to_handler)
 
 	GOT_ENTRY(__init_end)
-	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
 #endif /* CONFIG_NAND_SPL */
@@ -1624,7 +1624,7 @@
 	 * Now clear BSS segment
 	 */
 	lwz	r3,GOT(__bss_start)
-	lwz	r4,GOT(_end)
+	lwz	r4,GOT(__bss_end__)
 
 	cmplw	0, r3, r4
 	beq	7f
diff --git a/arch/powerpc/cpu/ppc4xx/u-boot.lds b/arch/powerpc/cpu/ppc4xx/u-boot.lds
index 656f59a..2466b79 100644
--- a/arch/powerpc/cpu/ppc4xx/u-boot.lds
+++ b/arch/powerpc/cpu/ppc4xx/u-boot.lds
@@ -140,6 +140,6 @@
   } :bss
 
   . = ALIGN(4);
-  _end = . ;
+  __bss_end__ = . ;
   PROVIDE (end = .);
 }
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index b88cf6b..4719f8c 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -123,7 +123,7 @@
 #endif
 
 extern ulong __init_end;
-extern ulong _end;
+extern ulong __bss_end__;
 ulong monitor_flash_len;
 
 #if defined(CONFIG_CMD_BEDBUG)
@@ -403,7 +403,7 @@
 	 *  - monitor code
 	 *  - board info struct
 	 */
-	len = (ulong)&_end - CONFIG_SYS_MONITOR_BASE;
+	len = (ulong)&__bss_end__ - CONFIG_SYS_MONITOR_BASE;
 
 	/*
 	 * Subtract specified amount of memory to hide so that it won't