[PARISC] Kill off broken irqstack code

[sfrench/cifs-2.6.git] / arch / parisc / kernel / entry.S

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index f324939bb9af2bd1f328e5850238e700dd9f2f5e..111d47284eacc8c492a2ce55d8f7f006005daa8b 100644 (file)
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -98,7 +98,6 @@
         * The "get_stack" macros are responsible for determining the
         * kernel stack value.
         *
-        * For Faults:
         *      If sr7 == 0
         *          Already using a kernel stack, so call the
         *          get_stack_use_r30 macro to push a pt_regs structure
@@ -110,26 +109,6 @@
         *          task pointer pointed to by cr30. Set the stack
         *          pointer to point to the end of the task structure.
         *
-        * For Interrupts:
-        *      If sr7 == 0
-        *          Already using a kernel stack, check to see if r30
-        *          is already pointing to the per processor interrupt
-        *          stack. If it is, call the get_stack_use_r30 macro
-        *          to push a pt_regs structure on the stack, and store
-        *          registers there. Otherwise, call get_stack_use_cr31
-        *          to get a pointer to the base of the interrupt stack
-        *          and push a pt_regs structure on that stack.
-        *      else
-        *          Need to set up a kernel stack, so call the
-        *          get_stack_use_cr30 macro to set up a pointer
-        *          to the pt_regs structure contained within the
-        *          task pointer pointed to by cr30. Set the stack
-        *          pointer to point to the end of the task structure.
-        *          N.B: We don't use the interrupt stack for the
-        *          first interrupt from userland, because signals/
-        *          resched's are processed when returning to userland,
-        *          and we can sleep in those cases.
-        *
         * Note that we use shadowed registers for temps until
         * we can save %r26 and %r29. %r26 is used to preserve
         * %r8 (a shadowed register) which temporarily contained
@@ -1086,23 +1065,13 @@ intr_do_preempt:
 
 intr_extint:
        CMPIB=,n 0,%r16,1f
+
        get_stack_use_cr30
-       b,n 3f
+       b,n 2f
 
 1:
-#if 0  /* Interrupt Stack support not working yet! */
-       mfctl   %cr31,%r1
-       copy    %r30,%r17
-       /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
-       DEPI    0,31,15,%r17
-       CMPB=,n %r1,%r17,2f
-       get_stack_use_cr31
-       b,n 3f
-#endif
-2:
        get_stack_use_r30
-
-3:
+2:
        save_specials   %r29
        virt_map
        save_general    %r29