Seen in allnoconfig: http://kisskb.ellerman.id.au/kisskb/buildresult/12450623/ arch/s390/kernel/setup.c: In function 'setup_arch': arch/s390/kernel/setup.c:875:2: error: implicit declaration of function 'smp_save_dump_cpus' make[2]: *** [arch/s390/kernel/setup.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [arch/s390/kernel] Error 2 make: *** [arch/s390] Error 2 make: *** Waiting for unfinished jobs.... 1592a8e456436024b6c662f423ce672e672169bb is the first bad commit commit 1592a8e456436024b6c662f423ce672e672169bb Author: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx> Date: Tue May 26 19:05:23 2015 +0200 s390/kdump: fix nosmt kernel parameter It turned out that SIGP set-multi-threading can only be done once. Therefore switching to a different MT level after switching to sclp.mtid_prev in the dump case fails. As a symptom specifying the "nosmt" parameter currently fails for the kdump kernel and the kernel starts with multi-threading enabled. So fix this and issue diag 308 subcode 1 call after collecting the CPU states for the dump. Also enhance the diag308_reset() function to be usable also with enabled lowcore protection and prefix register != 0. After the reset it is possible to switch the MT level again. We have to do the reset very early in order not to kill the already initialized console. Therefore instead of kmalloc() the corresponding memblock functions have to be used. To avoid copying the sclp cpu code into sclp_early, we now use the simple sigp loop method for CPU detection. Signed-off-by: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx> Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> :040000 040000 5430eab17daadf67943ab0b5d1979e88c9417e7b 4610519e89468a4c09080f463c31e51fbc2fb4f4 M arch :040000 040000 46b9da2c2a089589353ad9a55358803989cd9eb7 100d2243c38ece214cffc72f296a8860cff1a0e5 M drivers bisect run success -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
