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SubjectRe: [PATCH 03/18] printk: Convert pr_fmt from blank define to KBUILD_MODNAME
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On Fri, 2018-05-11 at 11:23 +0900, Sergey Senozhatsky wrote:
> On (05/11/18 10:51), Sergey Senozhatsky wrote:
> > In general, the idea looks OK to me, so FWIW
> > Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
>
> Looking at dmesg,
>
> Base:
> [ 0.000000] KERNEL supported cpus:
> [ 0.000000] Intel GenuineIntel
> [...]
> [ 0.000000] 00000-9FFFF write-back
> [ 0.000000] A0000-BFFFF uncachable
> [ 0.000000] C0000-FFFFF write-protect
> [ 0.000000] MTRR variable ranges enabled:
> [ 0.000000] 0 base 00E0000000 mask 7FE0000000 uncachable
> [ 0.000000] 1 disabled
> [ 0.000000] 2 disabled
> [ 0.000000] 3 disabled
> [ 0.000000] 4 disabled
> [..]
>
> Patched:
> [ 0.000000] common: KERNEL supported cpus:
> [ 0.000000] common: Intel GenuineIntel
> [...]
> [ 0.000000] generic: MTRR default type: write-back
> [ 0.000000] generic: MTRR fixed ranges enabled:
> [ 0.000000] generic: 00000-9FFFF write-back
> [ 0.000000] generic: A0000-BFFFF uncachable
> [ 0.000000] generic: C0000-FFFFF write-protect
> [ 0.000000] generic: MTRR variable ranges enabled:
> [ 0.000000] generic: 0 base 00E0000000 mask 7FE0000000 uncachable
> [ 0.000000] generic: 1 disabled
> [ 0.000000] generic: 2 disabled
> [ 0.000000] generic: 3 disabled
> [ 0.000000] generic: 4 disabled
> [..]
>
> Is it correct that WARN_ON() from "generic: " will now also be prefixed?
> In other words, we will have something like this
>
> [ 28.420519] generic: RSP: 0018:ffffa01dc062bda8 EFLAGS: 00010282
> [ 28.420522] generic: RAX: ffffffff8317612f RBX: ffffffffffffffea RCX: ffffa01dc062bdc8
> [ 28.420523] generic: RDX: 000055a6a3f03110 RSI: 0000000000000001 RDI: ffffffff83e31540
> [ 28.420525] generic: RBP: 0000000000000001 R08: ffffa01dc062bec0 R09: 0000000000000004
> [ 28.420526] generic: R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
> [ 28.420528] generic: R13: ffffffff83e31540 R14: ffffa01dc062bec0 R15: 0000000000000002
> [ 28.420547] generic: ? rcu_read_lock_sched_held+0x5d/0x63
> [ 28.420549] generic: ? rcu_sync_lockdep_assert+0x2e/0x54
> [ 28.420551] generic: ? __sb_start_write+0xeb/0x1a3
>
> Correct?

No, that stack dump comes from arch/x86/kernel/dumpstack.c
and that uses printk(KERN_DEFAULT ... and generic printk(
which is not prefixed at all.

And it's likely that there should be more files, if
the desired output is not prefixed, that should add

#define pr_fmt(fmt) fmt

to remove prefixes like "generic: "

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