sh: Conditionally re-enable IRQs in fault path.

[linux-2.6-omap-h63xx.git] / arch / sh / mm / fault_32.c

diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index d1fa27594c6e4f0d7340670597e0c5ee4517b9c5..0c776fdfbddae6800480dc0a3dc7be54103509b3 100644 (file)
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -37,16 +37,12 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
        int fault;
        siginfo_t info;
 
-       trace_hardirqs_on();
-       local_irq_enable();
-
 #ifdef CONFIG_SH_KGDB
        if (kgdb_nofault && kgdb_bus_err_hook)
                kgdb_bus_err_hook();
 #endif
 
        tsk = current;
-       mm = tsk->mm;
        si_code = SEGV_MAPERR;
 
        if (unlikely(address >= TASK_SIZE)) {
@@ -88,6 +84,14 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
                return;
        }
 
+       /* Only enable interrupts if they were on before the fault */
+       if ((regs->sr & SR_IMASK) != SR_IMASK) {
+               trace_hardirqs_on();
+               local_irq_enable();
+       }
+
+       mm = tsk->mm;
+
        /*
         * If we're in an interrupt or have no user
         * context, we must not take the fault..