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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-03-26 15:24:52 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-03-26 15:24:30 +0100
commit6d54c5a3fb13d32d66a8383cb0b5fb422a563051 (patch)
treed5d0ca7d73db6201c0b92e74bba789d144d5a97f /arch
parent008d2d112cb8a743a87dfe41a67e11c0a4c73aa4 (diff)
[S390] smp: fix memory leak on __cpu_up
If sigp_set_prefix fails on __cpu_up we leak the lowcore structures and async+panic stacks for the failed cpu. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kernel/smp.c6
-rw-r--r--arch/s390/kernel/vdso.c2
2 files changed, 3 insertions, 5 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index bb3d34aa7b8..1f4711b60aa 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -508,7 +508,6 @@ out:
return -ENOMEM;
}
-#ifdef CONFIG_HOTPLUG_CPU
static void smp_free_lowcore(int cpu)
{
struct _lowcore *lowcore;
@@ -527,7 +526,6 @@ static void smp_free_lowcore(int cpu)
free_pages((unsigned long) lowcore, lc_order);
lowcore_ptr[cpu] = NULL;
}
-#endif /* CONFIG_HOTPLUG_CPU */
/* Upping and downing of CPUs */
int __cpuinit __cpu_up(unsigned int cpu)
@@ -544,8 +542,10 @@ int __cpuinit __cpu_up(unsigned int cpu)
ccode = signal_processor_p((__u32)(unsigned long)(lowcore_ptr[cpu]),
cpu, sigp_set_prefix);
- if (ccode)
+ if (ccode) {
+ smp_free_lowcore(cpu);
return -EIO;
+ }
idle = current_set[cpu];
cpu_lowcore = lowcore_ptr[cpu];
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 690e1781968..89b2e7f1b7a 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -144,7 +144,6 @@ out:
return -ENOMEM;
}
-#ifdef CONFIG_HOTPLUG_CPU
void vdso_free_per_cpu(int cpu, struct _lowcore *lowcore)
{
unsigned long segment_table, page_table, page_frame;
@@ -163,7 +162,6 @@ void vdso_free_per_cpu(int cpu, struct _lowcore *lowcore)
free_page(page_table);
free_pages(segment_table, SEGMENT_ORDER);
}
-#endif /* CONFIG_HOTPLUG_CPU */
static void __vdso_init_cr5(void *dummy)
{