Commit 072c4c01 authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

powerpc/ftrace: Use pr_fmt() to namespace error messages



The printks() in our ftrace code have no prefix, so they appear on the
console with very little context, eg:

  Branch out of range

Use pr_fmt() & pr_err() to add a prefix. While we're at it, collapse a
few split lines that don't need to be, and add a missing newline to one
message.
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent d84e0d69
......@@ -10,6 +10,8 @@
*
*/
#define pr_fmt(fmt) "ftrace-powerpc: " fmt
#include <linux/spinlock.h>
#include <linux/hardirq.h>
#include <linux/uaccess.h>
......@@ -115,7 +117,7 @@ __ftrace_make_nop(struct module *mod,
/* Make sure that that this is still a 24bit jump */
if (!is_bl_op(op)) {
printk(KERN_ERR "Not expected bl: opcode is %x\n", op);
pr_err("Not expected bl: opcode is %x\n", op);
return -EINVAL;
}
......@@ -125,12 +127,12 @@ __ftrace_make_nop(struct module *mod,
pr_devel("ip:%lx jumps to %p", ip, tramp);
if (!is_module_trampoline(tramp)) {
printk(KERN_ERR "Not a trampoline\n");
pr_err("Not a trampoline\n");
return -EINVAL;
}
if (module_trampoline_target(mod, tramp, &ptr)) {
printk(KERN_ERR "Failed to get trampoline target\n");
pr_err("Failed to get trampoline target\n");
return -EFAULT;
}
......@@ -139,8 +141,7 @@ __ftrace_make_nop(struct module *mod,
entry = ppc_global_function_entry((void *)addr);
/* This should match what was called */
if (ptr != entry) {
printk(KERN_ERR "addr %lx does not match expected %lx\n",
ptr, entry);
pr_err("addr %lx does not match expected %lx\n", ptr, entry);
return -EINVAL;
}
......@@ -180,7 +181,7 @@ __ftrace_make_nop(struct module *mod,
/* Make sure that that this is still a 24bit jump */
if (!is_bl_op(op)) {
printk(KERN_ERR "Not expected bl: opcode is %x\n", op);
pr_err("Not expected bl: opcode is %x\n", op);
return -EINVAL;
}
......@@ -199,7 +200,7 @@ __ftrace_make_nop(struct module *mod,
/* Find where the trampoline jumps to */
if (probe_kernel_read(jmp, (void *)tramp, sizeof(jmp))) {
printk(KERN_ERR "Failed to read %lx\n", tramp);
pr_err("Failed to read %lx\n", tramp);
return -EFAULT;
}
......@@ -210,7 +211,7 @@ __ftrace_make_nop(struct module *mod,
((jmp[1] & 0xffff0000) != 0x398c0000) ||
(jmp[2] != 0x7d8903a6) ||
(jmp[3] != 0x4e800420)) {
printk(KERN_ERR "Not a trampoline\n");
pr_err("Not a trampoline\n");
return -EINVAL;
}
......@@ -222,8 +223,7 @@ __ftrace_make_nop(struct module *mod,
pr_devel(" %lx ", tramp);
if (tramp != addr) {
printk(KERN_ERR
"Trampoline location %08lx does not match addr\n",
pr_err("Trampoline location %08lx does not match addr\n",
tramp);
return -EINVAL;
}
......@@ -264,15 +264,13 @@ int ftrace_make_nop(struct module *mod,
*/
if (!rec->arch.mod) {
if (!mod) {
printk(KERN_ERR "No module loaded addr=%lx\n",
addr);
pr_err("No module loaded addr=%lx\n", addr);
return -EFAULT;
}
rec->arch.mod = mod;
} else if (mod) {
if (mod != rec->arch.mod) {
printk(KERN_ERR
"Record mod %p not equal to passed in mod %p\n",
pr_err("Record mod %p not equal to passed in mod %p\n",
rec->arch.mod, mod);
return -EINVAL;
}
......@@ -309,25 +307,24 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
* just mask it out when doing the compare.
*/
if ((op[0] != 0x48000008) || ((op[1] & 0xffff0000) != 0xe8410000)) {
printk(KERN_ERR "Unexpected call sequence: %x %x\n",
op[0], op[1]);
pr_err("Unexpected call sequence: %x %x\n", op[0], op[1]);
return -EINVAL;
}
/* If we never set up a trampoline to ftrace_caller, then bail */
if (!rec->arch.mod->arch.tramp) {
printk(KERN_ERR "No ftrace trampoline\n");
pr_err("No ftrace trampoline\n");
return -EINVAL;
}
/* Ensure branch is within 24 bits */
if (!create_branch(ip, rec->arch.mod->arch.tramp, BRANCH_SET_LINK)) {
printk(KERN_ERR "Branch out of range");
pr_err("Branch out of range\n");
return -EINVAL;
}
if (patch_branch(ip, rec->arch.mod->arch.tramp, BRANCH_SET_LINK)) {
printk(KERN_ERR "REL24 out of range!\n");
pr_err("REL24 out of range!\n");
return -EINVAL;
}
......@@ -346,13 +343,13 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
/* It should be pointing to a nop */
if (op != PPC_INST_NOP) {
printk(KERN_ERR "Expected NOP but have %x\n", op);
pr_err("Expected NOP but have %x\n", op);
return -EINVAL;
}
/* If we never set up a trampoline to ftrace_caller, then bail */
if (!rec->arch.mod->arch.tramp) {
printk(KERN_ERR "No ftrace trampoline\n");
pr_err("No ftrace trampoline\n");
return -EINVAL;
}
......@@ -360,7 +357,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
op = create_branch((unsigned int *)ip,
rec->arch.mod->arch.tramp, BRANCH_SET_LINK);
if (!op) {
printk(KERN_ERR "REL24 out of range!\n");
pr_err("REL24 out of range!\n");
return -EINVAL;
}
......@@ -398,7 +395,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
* already have a module defined.
*/
if (!rec->arch.mod) {
printk(KERN_ERR "No module loaded\n");
pr_err("No module loaded\n");
return -EINVAL;
}
......
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