ARM: no need for nommu to jump through the hoops that mmu does

nommu can jump directly to __mmap_switched without the absolute
address branching which the mmuful kernel does.

Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 573b803dc6bf667e49270f3873119c453e1c50d7..814ce1a732706d0cdb24f5e49007530715ba0b0a 100644 (file)
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -48,8 +48,6 @@ ENTRY(stext)
        movs    r8, r5                          @ invalid machine (r5=0)?
        beq     __error_a                       @ yes, error 'a'
 
-       ldr     r13, __switch_data              @ address to jump to after
-                                               @ the initialization is done
        adr     lr, BSYM(__after_proc_init)     @ return (PIC) address
  ARM(  add     pc, r10, #PROCINFO_INITFUNC     )
  THUMB(        add     r12, r10, #PROCINFO_INITFUNC    )
@@ -87,8 +85,7 @@ __after_proc_init:
        mcr     p15, 0, r0, c1, c0, 0           @ write control reg
 #endif /* CONFIG_CPU_CP15 */
 
-       mov     r3, r13
-       mov     pc, r3                          @ clear the BSS and jump
+       b       __mmap_switched                 @ clear the BSS and jump
                                                @ to start_kernel
 ENDPROC(__after_proc_init)
        .ltorg