Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

[pandora-kernel.git] / arch / powerpc / kernel / traps.c

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 05682a2..e4d1713 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -55,9 +55,6 @@
 
 #ifdef CONFIG_PPC64    /* XXX */
 #define _IO_BASE       pci_io_base
-#ifdef CONFIG_KEXEC
-cpumask_t cpus_in_sr = CPU_MASK_NONE;
-#endif
 #endif
 
 #ifdef CONFIG_DEBUGGER
@@ -211,6 +208,19 @@ void system_reset_exception(struct pt_regs *regs)
 
        die("System Reset", regs, SIGABRT);
 
+       /*
+        * Some CPUs when released from the debugger will execute this path.
+        * These CPUs entered the debugger via a soft-reset. If the CPU was
+        * hung before entering the debugger it will return to the hung
+        * state when exiting this function.  This causes a problem in
+        * kdump since the hung CPU(s) will not respond to the IPI sent
+        * from kdump. To prevent the problem we call crash_kexec_secondary()
+        * here. If a kdump had not been initiated or we exit the debugger
+        * with the "exit and recover" command (x) crash_kexec_secondary()
+        * will return after 5ms and the CPU returns to its previous state.
+        */
+       crash_kexec_secondary(regs);
+
        /* Must die if the interrupt is not recoverable */
        if (!(regs->msr & MSR_RI))
                panic("Unrecoverable System Reset");