powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all

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commit 8d81296cfc upstream.

radix__flush_tlb_all() is called only in kexec path in real mode and any
tracepoints at this stage will make kexec to fail if enabled.

To verify enable tlbie trace before kexec.

$ echo 1 > /sys/kernel/debug/tracing/events/powerpc/tlbie/enable
== kexec into new kernel and kexec fails.

Fix this by not calling trace_tlbie from radix__flush_tlb_all().

Fixes: 0428491cba ("powerpc/mm: Trace tlbie(l) instructions")
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Mahesh Salgaonkar 2017-11-30 14:35:54 +05:30 • committed by Greg Kroah-Hartman

parent 2e7e8bd8f1

commit 5b98d31481

1 changed files with 0 additions and 2 deletions

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arch/powerpc/mm/tlb-radix.c

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