sparc64: Kill __show_regs().

The story is that what we used to do when we actually used
smp_report_regs() is that if you specifically only wanted to have the
current cpu's registers dumped you would call "__show_regs()"
otherwise you would call show_regs() which also invoked
smp_report_regs().

Now that we killed off smp_report_regs() there is no longer any
reason to have these two routines, just show_regs() is sufficient.

Also kill off a stray declaration of show_regs() in sparc64_ksym.c

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 3 insertions, 28 deletions

diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index bf740e039b75..7f5debdc5fed 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -211,22 +211,8 @@ static void show_regwindow(struct pt_regs *regs)
                 printk("I7: <%pS>\n", (void *) rwk->ins[7]);
 }
 
-#ifdef CONFIG_SMP
-static DEFINE_SPINLOCK(regdump_lock);
-#endif
-
-void __show_regs(struct pt_regs * regs)
+void show_regs(struct pt_regs *regs)
 {
-#ifdef CONFIG_SMP
-        unsigned long flags;
-
-        /* Protect against xcall ipis which might lead to livelock on the lock */
-        __asm__ __volatile__("rdpr      %%pstate, %0\n\t"
-                             "wrpr      %0, %1, %%pstate"
-                             : "=r" (flags)
-                             : "i" (PSTATE_IE));
-        spin_lock(&regdump_lock);
-#endif
         printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x    %s\n", regs->tstate,
                regs->tpc, regs->tnpc, regs->y, print_tainted());
         printk("TPC: <%pS>\n", (void *) regs->tpc);
@@ -244,16 +230,6 @@ void __show_regs(struct pt_regs * regs)
                regs->u_regs[15]);
         printk("RPC: <%pS>\n", (void *) regs->u_regs[15]);
         show_regwindow(regs);
-#ifdef CONFIG_SMP
-        spin_unlock(&regdump_lock);
-        __asm__ __volatile__("wrpr      %0, 0, %%pstate"
-                             : : "r" (flags));
-#endif
-}
-
-void show_regs(struct pt_regs *regs)
-{
-        __show_regs(regs);
 }
 
 struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 504e678ee128..0804f71df6cb 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -68,7 +68,6 @@ extern void *__memscan_zero(void *, size_t);
 extern void *__memscan_generic(void *, int, size_t);
 extern int __memcmp(const void *, const void *, __kernel_size_t);
 extern __kernel_size_t strlen(const char *);
-extern void show_regs(struct pt_regs *);
 extern void syscall_trace(struct pt_regs *, int);
 extern void sys_sigsuspend(void);
 extern int compat_sys_ioctl(unsigned int fd, unsigned int cmd, u32 arg);
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index f56b6fe78e92..404e8561e2d0 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1777,7 +1777,7 @@ static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
                pfx,
                ent->err_raddr, ent->err_size, ent->err_cpu);
 
-        __show_regs(regs);
+        show_regs(regs);
 
         if ((cnt = atomic_read(ocnt)) != 0) {
                 atomic_set(ocnt, 0);
@@ -2189,7 +2189,7 @@ void die_if_kernel(char *str, struct pt_regs *regs)
         printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
         notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
         __asm__ __volatile__("flushw");
-        __show_regs(regs);
+        show_regs(regs);
         add_taint(TAINT_DIE);
         if (regs->tstate & TSTATE_PRIV) {
                 struct reg_window *rw = (struct reg_window *)