[PATCH v1 07/12] powerpc/ftrace: Use PPC_RAW_MFLR() and PPC_RAW_NOP()

From: Christophe Leroy
Date: Thu May 20 2021 - 06:49:53 EST


Use PPC_RAW_MFLR() instead of open coding with PPC_INST_MFLR.

Same for PPC_INST_NOP.

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
arch/powerpc/kernel/trace/ftrace.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index 937220310f99..a787a414ea6b 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -162,7 +162,7 @@ __ftrace_make_nop(struct module *mod,

#ifdef CONFIG_MPROFILE_KERNEL
/* When using -mkernel_profile there is no load to jump over */
- pop = ppc_inst(PPC_INST_NOP);
+ pop = ppc_inst(PPC_RAW_NOP());

if (copy_inst_from_kernel_nofault(&op, (void *)(ip - 4))) {
pr_err("Fetching instruction at %lx failed.\n", ip - 4);
@@ -170,7 +170,7 @@ __ftrace_make_nop(struct module *mod,
}

/* We expect either a mflr r0, or a std r0, LRSAVE(r1) */
- if (!ppc_inst_equal(op, ppc_inst(PPC_INST_MFLR)) &&
+ if (!ppc_inst_equal(op, ppc_inst(PPC_RAW_MFLR(_R0))) &&
!ppc_inst_equal(op, ppc_inst(PPC_INST_STD_LR))) {
pr_err("Unexpected instruction %s around bl _mcount\n",
ppc_inst_as_str(op));
@@ -278,7 +278,7 @@ __ftrace_make_nop(struct module *mod,
return -EINVAL;
}

- op = ppc_inst(PPC_INST_NOP);
+ op = ppc_inst(PPC_RAW_NOP());

if (patch_instruction((struct ppc_inst *)ip, op))
return -EPERM;
@@ -424,7 +424,7 @@ static int __ftrace_make_nop_kernel(struct dyn_ftrace *rec, unsigned long addr)
}
}

- if (patch_instruction((struct ppc_inst *)ip, ppc_inst(PPC_INST_NOP))) {
+ if (patch_instruction((struct ppc_inst *)ip, ppc_inst(PPC_RAW_NOP()))) {
pr_err("Patching NOP failed.\n");
return -EPERM;
}
@@ -446,7 +446,7 @@ int ftrace_make_nop(struct module *mod,
if (test_24bit_addr(ip, addr)) {
/* within range */
old = ftrace_call_replace(ip, addr, 1);
- new = ppc_inst(PPC_INST_NOP);
+ new = ppc_inst(PPC_RAW_NOP());
return ftrace_modify_code(ip, old, new);
} else if (core_kernel_text(ip))
return __ftrace_make_nop_kernel(rec, addr);
@@ -510,7 +510,7 @@ static int
expected_nop_sequence(void *ip, struct ppc_inst op0, struct ppc_inst op1)
{
/* look for patched "NOP" on ppc64 with -mprofile-kernel */
- if (!ppc_inst_equal(op0, ppc_inst(PPC_INST_NOP)))
+ if (!ppc_inst_equal(op0, ppc_inst(PPC_RAW_NOP())))
return 0;
return 1;
}
@@ -596,7 +596,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
return -EFAULT;

/* It should be pointing to a nop */
- if (!ppc_inst_equal(op, ppc_inst(PPC_INST_NOP))) {
+ if (!ppc_inst_equal(op, ppc_inst(PPC_RAW_NOP()))) {
pr_err("Expected NOP but have %s\n", ppc_inst_as_str(op));
return -EINVAL;
}
@@ -653,7 +653,7 @@ static int __ftrace_make_call_kernel(struct dyn_ftrace *rec, unsigned long addr)
return -EFAULT;
}

- if (!ppc_inst_equal(op, ppc_inst(PPC_INST_NOP))) {
+ if (!ppc_inst_equal(op, ppc_inst(PPC_RAW_NOP()))) {
pr_err("Unexpected call sequence at %p: %s\n", ip, ppc_inst_as_str(op));
return -EINVAL;
}
@@ -684,7 +684,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
*/
if (test_24bit_addr(ip, addr)) {
/* within range */
- old = ppc_inst(PPC_INST_NOP);
+ old = ppc_inst(PPC_RAW_NOP());
new = ftrace_call_replace(ip, addr, 1);
return ftrace_modify_code(ip, old, new);
} else if (core_kernel_text(ip))
--
2.25.0