ARC: Remove explicit passing around of ECR

With ECR now part of pt_regs

* No need to propagate from lowest asm handlers as arg
* No need to save it in tsk->thread.cause_code
* Avoid bit chopping to access the bit-fields

More code consolidation, cleanup

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

5 files changed, 8 insertions, 12 deletions

diff --git a/arch/arc/include/asm/bug.h b/arch/arc/include/asm/bug.h
index 2ad8f9b1c54b..5b18e94c6678 100644
--- a/arch/arc/include/asm/bug.h
+++ b/arch/arc/include/asm/bug.h
@@ -18,9 +18,8 @@ struct task_struct;
 void show_regs(struct pt_regs *regs);
 void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs);
 void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
-                            unsigned long address, unsigned long cause_reg);
-void die(const char *str, struct pt_regs *regs, unsigned long address,
-         unsigned long cause_reg);
+                            unsigned long address);
+void die(const char *str, struct pt_regs *regs, unsigned long address);
 
 #define BUG()   do {                            \
         dump_stack();                                   \
diff --git a/arch/arc/include/asm/kgdb.h b/arch/arc/include/asm/kgdb.h
index 4930957ca3d3..b65fca7ffeb5 100644
--- a/arch/arc/include/asm/kgdb.h
+++ b/arch/arc/include/asm/kgdb.h
@@ -31,7 +31,7 @@ static inline void arch_kgdb_breakpoint(void)
         __asm__ __volatile__ ("trap_s   0x4\n");
 }
 
-extern void kgdb_trap(struct pt_regs *regs, int param);
+extern void kgdb_trap(struct pt_regs *regs);
 
 enum arc700_linux_regnums {
         _R0             = 0,
@@ -53,7 +53,7 @@ enum arc700_linux_regnums {
 };
 
 #else
-#define kgdb_trap(regs, param)
+#define kgdb_trap(regs)
 #endif
 
 #endif  /* __ARC_KGDB_H__ */
diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h
index 4d9c211fce70..944dbedb38b5 100644
--- a/arch/arc/include/asm/kprobes.h
+++ b/arch/arc/include/asm/kprobes.h
@@ -50,11 +50,9 @@ struct kprobe_ctlblk {
 
 int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause);
 void kretprobe_trampoline(void);
-void trap_is_kprobe(unsigned long cause, unsigned long address,
-                           struct pt_regs *regs);
+void trap_is_kprobe(unsigned long address, struct pt_regs *regs);
 #else
-static void trap_is_kprobe(unsigned long cause, unsigned long address,
-                           struct pt_regs *regs)
+static void trap_is_kprobe(unsigned long address, struct pt_regs *regs)
 {
 }
 #endif
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index b0b5d2d9b3d3..15334ab66b56 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -29,7 +29,6 @@ struct thread_struct {
         unsigned long ksp;      /* kernel mode stack pointer */
         unsigned long callee_reg;       /* pointer to callee regs */
         unsigned long fault_address;    /* dbls as brkpt holder as well */
-        unsigned long cause_code;       /* Exception Cause Code (ECR) */
 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
         struct arc_fpu fpu;
 #endif
diff --git a/arch/arc/include/asm/unaligned.h b/arch/arc/include/asm/unaligned.h
index 5dbe63f17b66..60702f3751d2 100644
--- a/arch/arc/include/asm/unaligned.h
+++ b/arch/arc/include/asm/unaligned.h
@@ -16,11 +16,11 @@
 
 #ifdef CONFIG_ARC_MISALIGN_ACCESS
 int misaligned_fixup(unsigned long address, struct pt_regs *regs,
-                     unsigned long cause, struct callee_regs *cregs);
+                     struct callee_regs *cregs);
 #else
 static inline int
 misaligned_fixup(unsigned long address, struct pt_regs *regs,
-                 unsigned long cause, struct callee_regs *cregs)
+                 struct callee_regs *cregs)
 {
         return 0;
 }