sparc32: drop sun4c window overflow stack checking routine

Also drop run-time patching for srmmu

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

diff --git a/arch/sparc/kernel/wof.S b/arch/sparc/kernel/wof.S
index 3bbcd8d..4c2de3c 100644 (file)
--- a/arch/sparc/kernel/wof.S
+++ b/arch/sparc/kernel/wof.S
@@ -163,9 +163,8 @@ spwin_fromuser:
         * the label 'spwin_user_stack_is_bolixed' which will take
         * care of things at that point.
         */
-       .globl  spwin_mmu_patchme
-spwin_mmu_patchme:     b       spwin_sun4c_stackchk
-                                andcc  %sp, 0x7, %g0
+       b       spwin_srmmu_stackchk
+        andcc  %sp, 0x7, %g0
 
 spwin_good_ustack:
        /* LOCATION: Window to be saved */
@@ -306,73 +305,6 @@ spwin_bad_ustack_from_kernel:
  * As noted above %curptr cannot be touched by this routine at all.
  */
 
-spwin_sun4c_stackchk:
-       /* LOCATION: Window to be saved on the stack */
-
-       /* See if the stack is in the address space hole but first,
-        * check results of callers andcc %sp, 0x7, %g0
-        */
-       be      1f
-        sra    %sp, 29, %glob_tmp
-
-       rd      %psr, %glob_tmp
-       b       spwin_user_stack_is_bolixed + 0x4
-        nop
-
-1:
-       add     %glob_tmp, 0x1, %glob_tmp
-       andncc  %glob_tmp, 0x1, %g0
-       be      1f
-        and    %sp, 0xfff, %glob_tmp           ! delay slot
-
-       rd      %psr, %glob_tmp
-       b       spwin_user_stack_is_bolixed + 0x4
-        nop
-
-       /* See if our dump area will be on more than one
-        * page.
-        */
-1:
-       add     %glob_tmp, 0x38, %glob_tmp
-       andncc  %glob_tmp, 0xff8, %g0
-       be      spwin_sun4c_onepage             ! only one page to check
-        lda    [%sp] ASI_PTE, %glob_tmp        ! have to check first page anyways
-
-spwin_sun4c_twopages:
-       /* Is first page ok permission wise? */
-       srl     %glob_tmp, 29, %glob_tmp
-       cmp     %glob_tmp, 0x6
-       be      1f
-        add    %sp, 0x38, %glob_tmp    /* Is second page in vma hole? */
-
-       rd      %psr, %glob_tmp
-       b       spwin_user_stack_is_bolixed + 0x4
-        nop
-
-1:
-       sra     %glob_tmp, 29, %glob_tmp
-       add     %glob_tmp, 0x1, %glob_tmp
-       andncc  %glob_tmp, 0x1, %g0
-       be      1f
-        add    %sp, 0x38, %glob_tmp
-
-       rd      %psr, %glob_tmp
-       b       spwin_user_stack_is_bolixed + 0x4
-        nop
-
-1:
-       lda     [%glob_tmp] ASI_PTE, %glob_tmp
-
-spwin_sun4c_onepage:
-       srl     %glob_tmp, 29, %glob_tmp
-       cmp     %glob_tmp, 0x6                          ! can user write to it?
-       be      spwin_good_ustack                       ! success
-        nop
-
-       rd      %psr, %glob_tmp
-       b       spwin_user_stack_is_bolixed + 0x4
-        nop
-
        /* This is a generic SRMMU routine.  As far as I know this
         * works for all current v8/srmmu implementations, we'll
         * see...

diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index d76af19..43dcb36 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(spwin_mmu_patchme, spwin_srmmu_stackchk);
        PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
        PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
 }