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powerpc: split validate_sp into two functions

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Most callers just want to validate an arbitrary kernel stack pointer,
some need a particular size. Make the size case the exceptional one
with an extra function.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221127124942.1665522-15-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2022-11-27 22:49:39 +10:00
committed by Michael Ellerman
parent edbd0387f3
commit 4cefb0f6c5
4 changed files with 30 additions and 16 deletions
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2
arch/powerpc/kernel/stacktrace.c
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@@ -43,7 +43,7 @@ void __no_sanitize_address arch_stack_walk(stack_trace_consume_fn consume_entry,
unsigned long *stack = (unsigned long *) sp;
unsigned long newsp, ip;
if (!validate_sp(sp, task, STACK_FRAME_OVERHEAD))
if (!validate_sp(sp, task))
return;
newsp = stack[0];