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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>
This commit is contained in:
David S. Miller 2008-09-12 00:10:32 -07:00
parent a9e7bb0410
commit b539c46766
2 changed files with 2 additions and 37 deletions
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2
arch/sparc/include/asm/pgtable_64.h
View File

@ -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) */

37
arch/sparc64/mm/fault.c
View File

@ -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)