mtd/uclinux: Use generic __bss_stop instead of _ebss
Geert Uytterhoeven [Thu, 31 May 2012 20:39:21 +0000 (22:39 +0200)]
The standard (see BSS_SECTION() in <asm-generic/vmlinux.lds.h> and
<asm-generic/sections.h>) symbol for the end of BSS is __bss_stop.
This allows to remove all local declarations that have been added to
several architectures just to please CONFIG_MTD_UCLINUX.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Greg Ungerer <gerg@uclinux.org>

arch/blackfin/kernel/setup.c
arch/microblaze/include/asm/sections.h
arch/microblaze/kernel/microblaze_ksyms.c
arch/microblaze/kernel/setup.c
arch/microblaze/kernel/vmlinux.lds.S
arch/sh/include/asm/sections.h
arch/sh/kernel/setup.c
arch/sh/kernel/sh_ksyms_32.c
arch/sh/kernel/vmlinux.lds.S
arch/sh/lib/mcount.S
drivers/mtd/maps/uclinux.c

index ada8f0f..fb96e60 100644 (file)
@@ -52,7 +52,6 @@ EXPORT_SYMBOL(reserved_mem_dcache_on);
 #ifdef CONFIG_MTD_UCLINUX
 extern struct map_info uclinux_ram_map;
 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
-unsigned long _ebss;
 EXPORT_SYMBOL(memory_mtd_end);
 EXPORT_SYMBOL(memory_mtd_start);
 EXPORT_SYMBOL(mtd_size);
index 4487e15..c07ed5d 100644 (file)
@@ -18,10 +18,6 @@ extern char _ssbss[], _esbss[];
 extern unsigned long __ivt_start[], __ivt_end[];
 extern char _etext[], _stext[];
 
-#  ifdef CONFIG_MTD_UCLINUX
-extern char *_ebss;
-#  endif
-
 extern u32 _fdt_start[], _fdt_end[];
 
 # endif /* !__ASSEMBLY__ */
index bb4907c..2b25bcf 100644 (file)
@@ -21,9 +21,6 @@
 #include <linux/ftrace.h>
 #include <linux/uaccess.h>
 
-extern char *_ebss;
-EXPORT_SYMBOL_GPL(_ebss);
-
 #ifdef CONFIG_FUNCTION_TRACER
 extern void _mcount(void);
 EXPORT_SYMBOL(_mcount);
index 16d8dfd..4da971d 100644 (file)
@@ -121,7 +121,7 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
 
        /* Move ROMFS out of BSS before clearing it */
        if (romfs_size > 0) {
-               memmove(&_ebss, (int *)romfs_base, romfs_size);
+               memmove(&__bss_stop, (int *)romfs_base, romfs_size);
                klimit += romfs_size;
        }
 #endif
@@ -165,7 +165,7 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
        BUG_ON(romfs_size < 0); /* What else can we do? */
 
        printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
-                       romfs_size, romfs_base, (unsigned)&_ebss);
+                       romfs_size, romfs_base, (unsigned)&__bss_stop);
 
        printk("New klimit: 0x%08x\n", (unsigned)klimit);
 #endif
index 109e9d8..936d01a 100644 (file)
@@ -131,7 +131,6 @@ SECTIONS {
                        *(COMMON)
                . = ALIGN (4) ;
                __bss_stop = . ;
-               _ebss = . ;
        }
        . = ALIGN(PAGE_SIZE);
        _end = .;
index 4a53500..1b61997 100644 (file)
@@ -6,7 +6,6 @@
 extern long __nosave_begin, __nosave_end;
 extern long __machvec_start, __machvec_end;
 extern char __uncached_start, __uncached_end;
-extern char _ebss[];
 extern char __start_eh_frame[], __stop_eh_frame[];
 
 #endif /* __ASM_SH_SECTIONS_H */
index 7b57bf1..ebe7a7d 100644 (file)
@@ -273,7 +273,7 @@ void __init setup_arch(char **cmdline_p)
        data_resource.start = virt_to_phys(_etext);
        data_resource.end = virt_to_phys(_edata)-1;
        bss_resource.start = virt_to_phys(__bss_start);
-       bss_resource.end = virt_to_phys(_ebss)-1;
+       bss_resource.end = virt_to_phys(__bss_stop)-1;
 
 #ifdef CONFIG_CMDLINE_OVERWRITE
        strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
index 3896f26..2a0a596 100644 (file)
@@ -19,7 +19,6 @@ EXPORT_SYMBOL(csum_partial);
 EXPORT_SYMBOL(csum_partial_copy_generic);
 EXPORT_SYMBOL(copy_page);
 EXPORT_SYMBOL(__clear_user);
-EXPORT_SYMBOL(_ebss);
 EXPORT_SYMBOL(empty_zero_page);
 
 #define DECLARE_EXPORT(name)           \
index c98905f..db88cbf 100644 (file)
@@ -78,7 +78,6 @@ SECTIONS
        . = ALIGN(PAGE_SIZE);
        __init_end = .;
        BSS_SECTION(0, PAGE_SIZE, 4)
-       _ebss = .;                      /* uClinux MTD sucks */
        _end = . ;
 
        STABS_DEBUG
index 84a5776..60164e6 100644 (file)
@@ -39,7 +39,7 @@
  *
  * Make sure the stack pointer contains a valid address. Valid
  * addresses for kernel stacks are anywhere after the bss
- * (after _ebss) and anywhere in init_thread_union (init_stack).
+ * (after __bss_stop) and anywhere in init_thread_union (init_stack).
  */
 #define STACK_CHECK()                                  \
        mov     #(THREAD_SIZE >> 10), r0;               \
@@ -60,7 +60,7 @@
        cmp/hi  r2, r1;                                 \
        bf      stack_panic;                            \
                                                        \
-       /* If sp > _ebss then we're OK. */              \
+       /* If sp > __bss_stop then we're OK. */         \
        mov.l   .L_ebss, r1;                            \
        cmp/hi  r1, r15;                                \
        bt      1f;                                     \
@@ -70,7 +70,7 @@
        cmp/hs  r1, r15;                                \
        bf      stack_panic;                            \
                                                        \
-       /* If sp > init_stack && sp < _ebss, not OK. */ \
+       /* If sp > init_stack && sp < __bss_stop, not OK. */    \
        add     r0, r1;                                 \
        cmp/hs  r1, r15;                                \
        bt      stack_panic;                            \
@@ -292,8 +292,6 @@ stack_panic:
         nop
 
        .align 2
-.L_ebss:
-       .long   _ebss
 .L_init_thread_union:
        .long   init_thread_union
 .Lpanic:
index cfff454..c3bb304 100644 (file)
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
 #include <asm/io.h>
+#include <asm/sections.h>
 
 /****************************************************************************/
 
-extern char _ebss;
-
 struct map_info uclinux_ram_map = {
        .name = "RAM",
-       .phys = (unsigned long)&_ebss,
+       .phys = (unsigned long)__bss_stop,
        .size = 0,
 };