diff options
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_main.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c index 8d082b46426..d971817182f 100644 --- a/drivers/misc/sgi-xp/xpc_main.c +++ b/drivers/misc/sgi-xp/xpc_main.c @@ -53,6 +53,10 @@ #include <linux/kthread.h> #include "xpc.h" +#ifdef CONFIG_X86_64 +#include <asm/traps.h> +#endif + /* define two XPC debug device structures to be used with dev_dbg() et al */ struct device_driver xpc_dbg_name = { @@ -1079,6 +1083,9 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused) return NOTIFY_DONE; } +/* Used to only allow one cpu to complete disconnect */ +static unsigned int xpc_die_disconnecting; + /* * Notify other partitions to deactivate from us by first disengaging from all * references to our memory. @@ -1092,6 +1099,9 @@ xpc_die_deactivate(void) long keep_waiting; long wait_to_print; + if (cmpxchg(&xpc_die_disconnecting, 0, 1)) + return; + /* keep xpc_hb_checker thread from doing anything (just in case) */ xpc_exiting = 1; @@ -1159,7 +1169,7 @@ xpc_die_deactivate(void) * about the lack of a heartbeat. */ static int -xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused) +xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args) { #ifdef CONFIG_IA64 /* !!! temporary kludge */ switch (event) { @@ -1191,7 +1201,27 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused) break; } #else - xpc_die_deactivate(); + struct die_args *die_args = _die_args; + + switch (event) { + case DIE_TRAP: + if (die_args->trapnr == X86_TRAP_DF) + xpc_die_deactivate(); + + if (((die_args->trapnr == X86_TRAP_MF) || + (die_args->trapnr == X86_TRAP_XF)) && + !user_mode_vm(die_args->regs)) + xpc_die_deactivate(); + + break; + case DIE_INT3: + case DIE_DEBUG: + break; + case DIE_OOPS: + case DIE_GPF: + default: + xpc_die_deactivate(); + } #endif return NOTIFY_DONE; |