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x86/alternatives: Add pr_fmt() to debug macros

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... in order to have debug output prefixed with the pr_fmt text "SMP
alternatives:" which allows easy grepping:

  $ dmesg | grep "SMP alternatives"
  [    0.167783] SMP alternatives: alt table ffffffff8272c780, -> ffffffff8272fd6e
  [    0.168620] SMP alternatives: feat: 3*32+16, old: (x86_64_start_kernel+0x37/0x73 \
		  (ffffffff826093f7) len: 5), repl: (ffffffff8272fd6e, len: 5), pad: 0
  [    0.170103] SMP alternatives: ffffffff826093f7: old_insn: e8 54 a8 da fe
  [    0.171184] SMP alternatives: ffffffff8272fd6e: rpl_insn: e8 cd 3e c8 fe
  ...

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200615175315.17301-1-bp@alien8.de
This commit is contained in:
Borislav Petkov 2020-06-15 19:49:46 +02:00
parent b3a9e3b962
commit 1b2e335ebf
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/alternative.c
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@ -53,7 +53,7 @@ __setup("noreplace-smp", setup_noreplace_smp);
#define DPRINTK(fmt, args...) \
do { \
if (debug_alternative) \
printk(KERN_DEBUG "%s: " fmt "\n", __func__, ##args); \
printk(KERN_DEBUG pr_fmt(fmt) "\n", ##args); \
} while (0)
#define DUMP_BYTES(buf, len, fmt, args...) \
@ -64,7 +64,7 @@ do { \
if (!(len)) \
break; \
\
printk(KERN_DEBUG fmt, ##args); \
printk(KERN_DEBUG pr_fmt(fmt), ##args); \
for (j = 0; j < (len) - 1; j++) \
printk(KERN_CONT "%02hhx ", buf[j]); \
printk(KERN_CONT "%02hhx\n", buf[j]); \