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powerpc/irq: use memblock functions returning virtual address

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Since only the virtual address of allocated blocks is used,
lets use functions returning directly virtual address.

Those functions have the advantage of also zeroing the block.

Suggested-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-01-31 10:08:44 +00:00
committed by Michael Ellerman
parent eafd825ed7
commit c8e409a33c
3 changed files with 23 additions and 27 deletions
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26
arch/powerpc/kernel/setup_32.c
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@@ -196,6 +196,17 @@ static int __init ppc_init(void)
}
arch_initcall(ppc_init);
static void *__init alloc_stack(void)
{
void *ptr = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
if (!ptr)
panic("cannot allocate %d bytes for stack at %pS\n",
THREAD_SIZE, (void *)_RET_IP_);
return ptr;
}
void __init irqstack_early_init(void)
{
unsigned int i;
@@ -203,10 +214,8 @@ void __init irqstack_early_init(void)
/* interrupt stacks must be in lowmem, we get that for free on ppc32
* as the memblock is limited to lowmem by default */
for_each_possible_cpu(i) {
softirq_ctx[i] = (struct thread_info *)
__va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
hardirq_ctx[i] = (struct thread_info *)
__va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
softirq_ctx[i] = alloc_stack();
hardirq_ctx[i] = alloc_stack();
}
}
@@ -224,13 +233,10 @@ void __init exc_lvl_early_init(void)
hw_cpu = 0;
#endif
critirq_ctx[hw_cpu] = (struct thread_info *)
__va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
critirq_ctx[hw_cpu] = alloc_stack();
#ifdef CONFIG_BOOKE
dbgirq_ctx[hw_cpu] = (struct thread_info *)
__va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
mcheckirq_ctx[hw_cpu] = (struct thread_info *)
__va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
dbgirq_ctx[hw_cpu] = alloc_stack();
mcheckirq_ctx[hw_cpu] = alloc_stack();
#endif
}
}