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| author |   Alexander Gordeev <agordeev@linux.ibm.com> | 2021-05-06 16:26:52 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2021-06-07 17:07:00 +0200 |
| commit | 5789284710aa121416524acc54ac0d8c27c3c2ef (patch) | |
| tree | 75ff457c49a4d1a6525e2245eedc250e9729ba29 /arch/s390/kernel/setup.c | |
| parent | s390/mm: ensure switch_mm() is executed with interrupts disabled (diff) | |
| download | linux-dev-5789284710aa121416524acc54ac0d8c27c3c2ef.tar.xz linux-dev-5789284710aa121416524acc54ac0d8c27c3c2ef.zip | |
s390/smp: reallocate IPL CPU lowcore
The lowcore for IPL CPU is special. It is allocated early
in the boot process using memblock and never freed since.
The reason is pcpu_alloc_lowcore() and pcpu_free_lowcore()
routines use page allocator which is not available when
the IPL CPU is getting initialized.
Similar problem is already addressed for stacks - once the
virtual memory is available the early boot stacks get re-
allocated. Doing the same for lowcore will allow freeing
the IPL CPU lowcore and make no difference between the
boot and secondary CPUs.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index f069083a7517..146d01700a55 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -341,27 +341,6 @@ int __init arch_early_irq_init(void) return 0; } -static int __init stack_realloc(void) -{ - unsigned long old, new; - - old = S390_lowcore.async_stack - STACK_INIT_OFFSET; - new = stack_alloc(); - if (!new) - panic("Couldn't allocate async stack"); - WRITE_ONCE(S390_lowcore.async_stack, new + STACK_INIT_OFFSET); - free_pages(old, THREAD_SIZE_ORDER); - - old = S390_lowcore.mcck_stack - STACK_INIT_OFFSET; - new = stack_alloc(); - if (!new) - panic("Couldn't allocate machine check stack"); - WRITE_ONCE(S390_lowcore.mcck_stack, new + STACK_INIT_OFFSET); - memblock_free_late(old, THREAD_SIZE); - return 0; -} -early_initcall(stack_realloc); - void __init arch_call_rest_init(void) { unsigned long stack; |