[PATCH] i386: CONFIG_PHYSICAL_START cleanup

Defining __PHYSICAL_START and __KERNEL_START in asm-i386/page.h works but
it triggers a full kernel rebuild for the silliest of reasons.  This
modifies the users to directly use CONFIG_PHYSICAL_START and linux/config.h
which prevents the full rebuild problem, which makes the code much
more maintainer and hopefully user friendly.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

4 files changed, 7 insertions, 12 deletions

diff --git a/arch/i386/boot/compressed/head.S b/arch/i386/boot/compressed/head.S
index b5893e4ecd37..40a8de8270a9 100644
--- a/arch/i386/boot/compressed/head.S
+++ b/arch/i386/boot/compressed/head.S
@@ -25,7 +25,6 @@
 
 #include <linux/linkage.h>
 #include <asm/segment.h>
-#include <asm/page.h>
 
         .globl startup_32
         
@@ -75,7 +74,7 @@ startup_32:
         popl %esi       # discard address
         popl %esi       # real mode pointer
         xorl %ebx,%ebx
-        ljmp $(__BOOT_CS), $__PHYSICAL_START
+        ljmp $(__BOOT_CS), $CONFIG_PHYSICAL_START
 
 /*
  * We come here, if we were loaded high.
@@ -100,7 +99,7 @@ startup_32:
         popl %ecx       # lcount
         popl %edx       # high_buffer_start
         popl %eax       # hcount
-        movl $__PHYSICAL_START,%edi
+        movl $CONFIG_PHYSICAL_START,%edi
         cli             # make sure we don't get interrupted
         ljmp $(__BOOT_CS), $0x1000 # and jump to the move routine
 
@@ -125,5 +124,5 @@ move_routine_start:
         movsl
         movl %ebx,%esi  # Restore setup pointer
         xorl %ebx,%ebx
-        ljmp $(__BOOT_CS), $__PHYSICAL_START
+        ljmp $(__BOOT_CS), $CONFIG_PHYSICAL_START
 move_routine_end:
diff --git a/arch/i386/boot/compressed/misc.c b/arch/i386/boot/compressed/misc.c
index b2ccd543410d..20970ff44119 100644
--- a/arch/i386/boot/compressed/misc.c
+++ b/arch/i386/boot/compressed/misc.c
@@ -13,7 +13,6 @@
 #include <linux/vmalloc.h>
 #include <linux/screen_info.h>
 #include <asm/io.h>
-#include <asm/page.h>
 
 /*
  * gzip declarations
@@ -303,7 +302,7 @@ static void setup_normal_output_buffer(void)
 #else
         if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < 1024) error("Less than 2MB of memory");
 #endif
-        output_data = (unsigned char *)__PHYSICAL_START; /* Normally Points to 1M */
+        output_data = (unsigned char *)CONFIG_PHYSICAL_START; /* Normally Points to 1M */
         free_mem_end_ptr = (long)real_mode;
 }
 
@@ -326,8 +325,8 @@ static void setup_output_buffer_if_we_run_high(struct moveparams *mv)
         low_buffer_size = low_buffer_end - LOW_BUFFER_START;
         high_loaded = 1;
         free_mem_end_ptr = (long)high_buffer_start;
-        if ( (__PHYSICAL_START + low_buffer_size) > ((ulg)high_buffer_start)) {
-                high_buffer_start = (uch *)(__PHYSICAL_START + low_buffer_size);
+        if ( (CONFIG_PHYSICAL_START + low_buffer_size) > ((ulg)high_buffer_start)) {
+                high_buffer_start = (uch *)(CONFIG_PHYSICAL_START + low_buffer_size);
                 mv->hcount = 0; /* say: we need not to move high_buffer */
         }
         else mv->hcount = -1;
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index c217e18f1081..f8d61ec4c8cb 100644
--- a/arch/i386/kernel/vmlinux.lds.S
+++ b/arch/i386/kernel/vmlinux.lds.S
@@ -27,7 +27,7 @@ PHDRS {
 }
 SECTIONS
 {
-  . = __KERNEL_START;
+  . = LOAD_OFFSET + CONFIG_PHYSICAL_START;
   phys_startup_32 = startup_32 - LOAD_OFFSET;
   /* read-only */
   .text : AT(ADDR(.text) - LOAD_OFFSET) {
diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index 5a70501291d6..2b69686107ae 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -112,12 +112,9 @@ extern int page_is_ram(unsigned long pagenr);
 
 #ifdef __ASSEMBLY__
 #define __PAGE_OFFSET           CONFIG_PAGE_OFFSET
-#define __PHYSICAL_START        CONFIG_PHYSICAL_START
 #else
 #define __PAGE_OFFSET           ((unsigned long)CONFIG_PAGE_OFFSET)
-#define __PHYSICAL_START        ((unsigned long)CONFIG_PHYSICAL_START)
 #endif
-#define __KERNEL_START          (__PAGE_OFFSET + __PHYSICAL_START)
 
 
 #define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)