sparc64: Fix sparse warnings in fault.c

1) set_brkpt() is referenced by nothing and hasn't been used by anyone
   to my knowledge for many many years.  So just delete it.

2) add extern decl for do_sparc64_fault() in asm/pgtable_64.h

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

2 files changed, 2 insertions, 37 deletions

diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index bb9ec2cce355..b049abf9902f 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -770,6 +770,8 @@ extern void sun4v_patch_tlb_handlers(void);
 
 extern unsigned long cmdline_memory_size;
 
+extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
+
 #endif /* !(__ASSEMBLY__) */
 
 #endif /* !(_SPARC64_PGTABLE_H) */
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index ea7d7ae76bc2..a9e474bf6385 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -51,43 +51,6 @@ static inline int notify_page_fault(struct pt_regs *regs)
 }
 #endif
 
-/*
- * To debug kernel to catch accesses to certain virtual/physical addresses.
- * Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
- * flags = VM_READ watches memread accesses, flags = VM_WRITE watches memwrite accesses.
- * Caller passes in a 64bit aligned addr, with mask set to the bytes that need to be
- * watched. This is only useful on a single cpu machine for now. After the watchpoint
- * is detected, the process causing it will be killed, thus preventing an infinite loop.
- */
-void set_brkpt(unsigned long addr, unsigned char mask, int flags, int mode)
-{
-        unsigned long lsubits;
-
-        __asm__ __volatile__("ldxa [%%g0] %1, %0"
-                             : "=r" (lsubits)
-                             : "i" (ASI_LSU_CONTROL));
-        lsubits &= ~(LSU_CONTROL_PM | LSU_CONTROL_VM |
-                     LSU_CONTROL_PR | LSU_CONTROL_VR |
-                     LSU_CONTROL_PW | LSU_CONTROL_VW);
-
-        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
-                             "membar    #Sync"
-                             : /* no outputs */
-                             : "r" (addr), "r" (mode ? VIRT_WATCHPOINT : PHYS_WATCHPOINT),
-                               "i" (ASI_DMMU));
-
-        lsubits |= ((unsigned long)mask << (mode ? 25 : 33));
-        if (flags & VM_READ)
-                lsubits |= (mode ? LSU_CONTROL_VR : LSU_CONTROL_PR);
-        if (flags & VM_WRITE)
-                lsubits |= (mode ? LSU_CONTROL_VW : LSU_CONTROL_PW);
-        __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
-                             "membar #Sync"
-                             : /* no outputs */
-                             : "r" (lsubits), "i" (ASI_LSU_CONTROL)
-                             : "memory");
-}
-
 static void __kprobes unhandled_fault(unsigned long address,
                                       struct task_struct *tsk,
                                       struct pt_regs *regs)