From 8143adafd2d00b13f1db96ce06b6bf479e0bfe5b Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Tue, 24 Jul 2012 18:43:02 +0200 Subject: [PATCH] s390/ipl: Use diagnose 8 command separation Currently the vmcmd shutdown action is parsed by the kernel and if multiple cp commands have been specified, they are issued separately with the cpcmd() function. The underlying diagnose 8 instruction already allows to specify multiple commands that are separated by 0x15. The ASCEBC() function used by cpcmd() translates '\n' to 0x15. The '\n' character is currently used as vmcmd command separator and therefore the vmcmd string can be passed directly to the cpcmd() function. Using the diagnose 8 command separation has the advantage that also after disruptive commands that stop Linux, for example "def store", additional commands can be executed. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/ipl.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index e64d141555c..6ffcd320321 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -1583,7 +1583,7 @@ static struct kset *vmcmd_kset; static void vmcmd_run(struct shutdown_trigger *trigger) { - char *cmd, *next_cmd; + char *cmd; if (strcmp(trigger->name, ON_REIPL_STR) == 0) cmd = vmcmd_on_reboot; @@ -1600,15 +1600,7 @@ static void vmcmd_run(struct shutdown_trigger *trigger) if (strlen(cmd) == 0) return; - do { - next_cmd = strchr(cmd, '\n'); - if (next_cmd) { - next_cmd[0] = 0; - next_cmd += 1; - } - __cpcmd(cmd, NULL, 0, NULL); - cmd = next_cmd; - } while (cmd != NULL); + __cpcmd(cmd, NULL, 0, NULL); } static int vmcmd_init(void) -- 2.43.2