[Blackfin] arch: move the init sections to the end of memory

Move the init sections to the end of memory so that after they
are free, run time memory is all continugous - this should help decrease
memory fragementation.

When doing this, we also pack some of the other sections a little closer
together, to make sure we don't waste memory. To make this happen,
we need to rename the .data.init_task section to .init_task.data, so
it doesn't get picked up by the linker script glob.

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index aca5e6e5bbdd..060080789495 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -427,7 +427,7 @@ static __init void parse_cmdline_early(char *cmdline_p)
 static __init void  memory_setup(void)
 {
         _rambase = (unsigned long)_stext;
-        _ramstart = (unsigned long)__bss_stop;
+        _ramstart = (unsigned long)_end;
 
         if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
                 console_init();
@@ -489,7 +489,7 @@ static __init void  memory_setup(void)
         }
 
         /* Relocate MTD image to the top of memory after the uncached memory area */
-        dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
+        dma_memcpy((char *)memory_end, _end, mtd_size);
 
         memory_mtd_start = memory_end;
         _ebss = memory_mtd_start;       /* define _ebss for compatible */
@@ -528,13 +528,13 @@ static __init void  memory_setup(void)
         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
 
-        printk( KERN_INFO "Memory map:\n"
+        printk(KERN_INFO "Memory map:\n"
                 KERN_INFO "  text      = 0x%p-0x%p\n"
                 KERN_INFO "  rodata    = 0x%p-0x%p\n"
+                KERN_INFO "  bss       = 0x%p-0x%p\n"
                 KERN_INFO "  data      = 0x%p-0x%p\n"
                 KERN_INFO "    stack   = 0x%p-0x%p\n"
                 KERN_INFO "  init      = 0x%p-0x%p\n"
-                KERN_INFO "  bss       = 0x%p-0x%p\n"
                 KERN_INFO "  available = 0x%p-0x%p\n"
 #ifdef CONFIG_MTD_UCLINUX
                 KERN_INFO "  rootfs    = 0x%p-0x%p\n"
@@ -544,12 +544,12 @@ static __init void  memory_setup(void)
 #endif
                 , _stext, _etext,
                 __start_rodata, __end_rodata,
+                __bss_start, __bss_stop,
                 _sdata, _edata,
                 (void *)&init_thread_union,
                 (void *)((int)(&init_thread_union) + 0x2000),
-               __init_begin, __init_end,
-               __bss_start, __bss_stop,
-               (void *)_ramstart, (void *)memory_end
+                __init_begin, __init_end,
+                (void *)_ramstart, (void *)memory_end
 #ifdef CONFIG_MTD_UCLINUX
                 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
 #endif