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Code Issues Releases Wiki Activity

powerpc/pseries: Don't trace hcall tracing wrapper

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This doesn't seem very useful to trace before the recursion check, even
if the ftrace code has any recursion checks of its own. Be on the safe
side and don't trace the hcall trace wrappers.

Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210508101455.1578318-3-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2021-05-08 20:14:53 +10:00 committed by Michael Ellerman
parent 2c8c89b958
commit a3f1a39a56
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/platforms/pseries/lpar.c
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@ -1835,7 +1835,7 @@ void hcall_tracepoint_unregfunc(void)
static DEFINE_PER_CPU(unsigned int, hcall_trace_depth);
void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
notrace void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
{
unsigned long flags;
unsigned int *depth;
@ -1863,7 +1863,7 @@ void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
local_irq_restore(flags);
}
void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf)
notrace void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf)
{
unsigned long flags;
unsigned int *depth;