sparc32: drop sun4c stack checking routine

And drop run-time patching too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/kernel/etrap_32.S b/arch/sparc/kernel/etrap_32.S
index e806fcd..84b5f0d 100644 (file)
--- a/arch/sparc/kernel/etrap_32.S
+++ b/arch/sparc/kernel/etrap_32.S
@@ -216,9 +216,7 @@ tsetup_patch6:
        /* Call MMU-architecture dependent stack checking
         * routine.
         */
-       .globl  tsetup_mmu_patchme
-tsetup_mmu_patchme:
-       b       tsetup_sun4c_stackchk
+       b       tsetup_srmmu_stackchk
         andcc  %sp, 0x7, %g0
 
        /* Architecture specific stack checking routines.  When either
@@ -228,52 +226,6 @@ tsetup_mmu_patchme:
         */
 #define glob_tmp     g1
 
-tsetup_sun4c_stackchk:
-       /* Done by caller: andcc %sp, 0x7, %g0 */
-       bne     trap_setup_user_stack_is_bolixed
-        sra    %sp, 29, %glob_tmp
-
-       add     %glob_tmp, 0x1, %glob_tmp
-       andncc  %glob_tmp, 0x1, %g0
-       bne     trap_setup_user_stack_is_bolixed
-        and    %sp, 0xfff, %glob_tmp           ! delay slot
-
-       /* See if our dump area will be on more than one
-        * page.
-        */
-       add     %glob_tmp, 0x38, %glob_tmp
-       andncc  %glob_tmp, 0xff8, %g0
-       be      tsetup_sun4c_onepage            ! only one page to check
-        lda    [%sp] ASI_PTE, %glob_tmp        ! have to check first page anyways
-
-tsetup_sun4c_twopages:
-       /* Is first page ok permission wise? */
-       srl     %glob_tmp, 29, %glob_tmp
-       cmp     %glob_tmp, 0x6
-       bne     trap_setup_user_stack_is_bolixed
-        add    %sp, 0x38, %glob_tmp            /* Is second page in vma hole? */
-
-       sra     %glob_tmp, 29, %glob_tmp
-       add     %glob_tmp, 0x1, %glob_tmp
-       andncc  %glob_tmp, 0x1, %g0
-       bne     trap_setup_user_stack_is_bolixed
-        add    %sp, 0x38, %glob_tmp
-
-       lda     [%glob_tmp] ASI_PTE, %glob_tmp
-
-tsetup_sun4c_onepage:
-       srl     %glob_tmp, 29, %glob_tmp
-       cmp     %glob_tmp, 0x6                          ! can user write to it?
-       bne     trap_setup_user_stack_is_bolixed        ! failure
-        nop
-
-       STORE_WINDOW(sp)
-
-       restore %g0, %g0, %g0
-
-       jmpl    %t_retpc + 0x8, %g0
-        mov    %t_kstack, %sp
-
        .globl  tsetup_srmmu_stackchk
 tsetup_srmmu_stackchk:
        /* Check results of callers andcc %sp, 0x7, %g0 */

diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 43dcb36..deb7dd8 100644 (file)
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -2144,7 +2144,6 @@ static void __init patch_window_trap_handlers(void)
 {
        unsigned long *iaddr, *daddr;
        
-       PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
        PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
 }