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powerpc/kexec: Fix build failure on 32-bit SMP 

Commit b987812b3f left
crash_kexec_wait_realmode() undefined for UP.

Commit 7c7a81b53e defined it for UP but
left it undefined for 32-bit SMP.

Seems like people are getting confused by nested #ifdef's, so move the
definitions of crash_kexec_wait_realmode() after the #ifdef CONFIG_SMP
section.

Compile-tested with 32-bit UP, 32-bit SMP and 64-bit SMP configurations.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Ben Hutchings 2011-04-24 15:04:31 +00:00 committed by Benjamin Herrenschmidt
parent 104699c0ab
commit 7707e4110e
1 changed files with 30 additions and 29 deletions
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59
arch/powerpc/kernel/crash.c
View File

@ -162,34 +162,6 @@ static void crash_kexec_prepare_cpus(int cpu)
/* Leave the IPI callback set */
}
/* wait for all the CPUs to hit real mode but timeout if they don't come in */
#ifdef CONFIG_PPC_STD_MMU_64
static void crash_kexec_wait_realmode(int cpu)
{
unsigned int msecs;
int i;
msecs = 10000;
for (i=0; i < NR_CPUS && msecs > 0; i++) {
if (i == cpu)
continue;
while (paca[i].kexec_state < KEXEC_STATE_REAL_MODE) {
barrier();
if (!cpu_possible(i)) {
break;
}
if (!cpu_online(i)) {
break;
}
msecs--;
mdelay(1);
}
}
mb();
}
#endif /* CONFIG_PPC_STD_MMU_64 */
/*
* This function will be called by secondary cpus or by kexec cpu
* if soft-reset is activated to stop some CPUs.
@ -234,7 +206,6 @@ void crash_kexec_secondary(struct pt_regs *regs)
}
#else /* ! CONFIG_SMP */
static inline void crash_kexec_wait_realmode(int cpu) {}
static void crash_kexec_prepare_cpus(int cpu)
{
@ -257,6 +228,36 @@ void crash_kexec_secondary(struct pt_regs *regs)
}
#endif /* CONFIG_SMP */
/* wait for all the CPUs to hit real mode but timeout if they don't come in */
#if defined(CONFIG_SMP) && defined(CONFIG_PPC_STD_MMU_64)
static void crash_kexec_wait_realmode(int cpu)
{
unsigned int msecs;
int i;
msecs = 10000;
for (i=0; i < NR_CPUS && msecs > 0; i++) {
if (i == cpu)
continue;
while (paca[i].kexec_state < KEXEC_STATE_REAL_MODE) {
barrier();
if (!cpu_possible(i)) {
break;
}
if (!cpu_online(i)) {
break;
}
msecs--;
mdelay(1);
}
}
mb();
}
#else
static inline void crash_kexec_wait_realmode(int cpu) {}
#endif /* CONFIG_SMP && CONFIG_PPC_STD_MMU_64 */
/*
* Register a function to be called on shutdown. Only use this if you
* can't reset your device in the second kernel.