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powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32 

PPC32 mcount() caller already saves LR on stack,
no need to save it again.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/eadcfc770b4f1e35535ffb85e28e858a2c31dec4.1640017960.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-12-20 16:38:16 +00:00 committed by Michael Ellerman
parent a4520b2527
commit 7875bc9b07
1 changed files with 0 additions and 3 deletions
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3
arch/powerpc/kernel/trace/ftrace_32.S
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@ -53,9 +53,6 @@ _GLOBAL(ftrace_stub)
blr
_GLOBAL(ftrace_regs_caller)
/* Save the original return address in A's stack frame */
stw r0,LRSAVE(r1)
/* Create our stack frame + pt_regs */
stwu r1,-INT_FRAME_SIZE(r1)