From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Srivatsa S. Bhat" Subject: Re: Linux 3.4-rc7 Date: Tue, 15 May 2012 23:59:36 +0530 Message-ID: <4FB2A090.6060404@linux.vnet.ibm.com> References: <4FB011E7.1000604@linux.vnet.ibm.com> <4FB0197F.6010000@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: John David Anglin , "akpm@linux-foundation.org" , Ingo Molnar , Peter Zijlstra , Mikulas Patocka , stepanm@codeaurora.org, Thomas Gleixner , James.Bottomley@hansenpartnership.com, deller@gmx.de, dhowells@redhat.com, yasutake.koichi@jp.panasonic.com, eike-kernel@sf-tec.de, linux-parisc@vger.kernel.org, "linux-kernel@vger.kernel.org" To: Linus Torvalds Return-path: In-Reply-To: List-ID: List-Id: linux-parisc.vger.kernel.org On 05/15/2012 10:54 PM, Linus Torvalds wrote: > On Sun, May 13, 2012 at 5:42 PM, John David Anglin wrote: >> >> I successfully booted 3.4-rc7 with this change on rp3440 (4 cpu smp). My >> build also >> included cache and other fixes that are being discussed on the parisc list. > > Can somebody send the final patches with proper subject lines etc, > instead of hiding them in unrelated threads? I hate picking up patches > that I don't personally know from the middle of some random thread. > Okay, here they are: This is for PA-RISC: --- From: Srivatsa S. Bhat Subject: [PATCH] parisc/CPU hotplug: Add missing call to notify_cpu_starting() The scheduler depends on receiving the CPU_STARTING notification, without which we end up into a lot of trouble. So add the missing call to notify_cpu_starting() in the bringup code. Signed-off-by: Srivatsa S. Bhat Acked-and-Tested-by: Mikulas Patocka Acked-and-Tested-by: Tobias Ulmer Tested-by: John David Anglin --- arch/parisc/kernel/smp.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index 0bb1d63..4dc7b79 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include @@ -295,8 +296,13 @@ smp_cpu_init(int cpunum) printk(KERN_CRIT "CPU#%d already initialized!\n", cpunum); machine_halt(); - } + } + + notify_cpu_starting(cpunum); + + ipi_call_lock(); set_cpu_online(cpunum, true); + ipi_call_unlock(); /* Initialise the idle task for this CPU */ atomic_inc(&init_mm.mm_count);