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powerpc/ftrace: Don't use lmw/stmw in ftrace_regs_caller() 

For the same reason as commit a85c728cb5 ("powerpc/32: Don't use
lmw/stmw for saving/restoring non volatile regs"), don't use
lmw/stmw in ftrace_regs_caller().

Use the same macros for PPC32 and PPC64.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ec286d2cc6989668a96f14543275437d2f3f0e3a.1645099283.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2022-02-17 13:01:56 +01:00 committed by Michael Ellerman
parent 57201d657e
commit 9bdb2eec3d
1 changed files with 2 additions and 8 deletions
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10
arch/powerpc/kernel/trace/ftrace_mprofile.S
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@ -43,18 +43,16 @@ _GLOBAL(ftrace_regs_caller)
/* Save all gprs to pt_regs */
SAVE_GPR(0, r1)
#ifdef CONFIG_PPC64
SAVE_GPRS(2, 11, r1)
#ifdef CONFIG_PPC64
/* Ok to continue? */
lbz r3, PACA_FTRACE_ENABLED(r13)
cmpdi r3, 0
beq ftrace_no_trace
#endif
SAVE_GPRS(12, 31, r1)
#else
stmw r2, GPR2(r1)
#endif
/* Save previous stack pointer (r1) */
addi r8, r1, SWITCH_FRAME_SIZE
@ -120,11 +118,7 @@ ftrace_regs_call:
#endif
/* Restore gprs */
#ifdef CONFIG_PPC64
REST_GPRS(2, 31, r1)
#else
lmw r2, GPR2(r1)
#endif
/* Restore possibly modified LR */
PPC_LL r0, _LINK(r1)