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powerpc/64s: Prevent fallthrough to hash TLB flush when using radix 

In the fix reconnecting hash__tlb_flush() to tlb_flush() the
void return on radix__tlb_flush() was not restored and subsequently
falls through to the restored hash__tlb_flush().

Guard hash__tlb_flush() under an else to prevent this.

Fixes: 1665c027af ("powerpc/64s: Reconnect tlb_flush() to hash__tlb_flush()")
Reported-by: "Erhard F." <erhard_f@mailbox.org>
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230217011434.115554-1-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray 2023-02-17 12:14:34 +11:00 committed by Michael Ellerman
parent 2ea31e2e62
commit 4302abc628
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/include/asm/book3s/64/tlbflush.h
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@ -97,8 +97,8 @@ static inline void tlb_flush(struct mmu_gather *tlb)
{
if (radix_enabled())
radix__tlb_flush(tlb);
return hash__tlb_flush(tlb);
else
hash__tlb_flush(tlb);
}
#ifdef CONFIG_SMP