From 072c4c018e547b4bd6cfa4086aae881140b62759 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 17 Jun 2014 16:15:36 +1000 Subject: 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: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/ftrace.c | 43 ++++++++++++++++++++----------------------- 1 file changed, 20 insertions(+), 23 deletions(-) (limited to 'arch/powerpc') diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 96efc664b49d..d178834fe508 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -10,6 +10,8 @@ * */ +#define pr_fmt(fmt) "ftrace-powerpc: " fmt + #include #include #include @@ -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; } -- cgit v1.2.3