ARC: pt_regs update #0: remove kernel stack canary

This stack slot is going to be used in subsequent commits

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
index eb2ae53..5bbec8a 100644 (file)
--- a/arch/arc/include/asm/entry.h
+++ b/arch/arc/include/asm/entry.h
@@ -326,10 +326,6 @@
        /* With current tsk in r9, get it's kernel mode stack base */
        GET_TSK_STACK_BASE  r9, r9
 
-#ifdef PT_REGS_CANARY
-       st      0xabcdabcd, [r9, 0]
-#endif
-
        /* Save Pre Intr/Exception User SP on kernel stack */
        st.a    sp, [r9, -12]   ; Make room for orig_r0 and orig_r8
 
@@ -437,11 +433,6 @@
        lr      r9, [erbta]
        st.a    r9, [sp, -4]
 
-#ifdef PT_REGS_CANARY
-       mov   r9, 0xdeadbeef
-       st    r9, [sp, -4]
-#endif
-
        /* move up by 1 word to "create" pt_regs->"stack_place_holder" */
        sub sp, sp, 4
 .endm
@@ -540,10 +531,6 @@
        lr      r9, [bta_l1]
        st.a    r9, [sp, -4]
 
-#ifdef PT_REGS_CANARY
-       mov   r9, 0xdeadbee1
-       st    r9, [sp, -4]
-#endif
        /* move up by 1 word to "create" pt_regs->"stack_place_holder" */
        sub sp, sp, 4
 .endm
@@ -575,11 +562,6 @@
        lr      r9, [bta_l2]
        st.a    r9, [sp, -4]
 
-#ifdef PT_REGS_CANARY
-       mov   r9, 0xdeadbee2
-       st    r9, [sp, -4]
-#endif
-
        /* move up by 1 word to "create" pt_regs->"stack_place_holder" */
        sub sp, sp, 4
 .endm