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Subject[PATCH 0/6] loglevel=pci:8,acpi:8,apic=8 support v5
Date
    KERN_PCI
KERN_ACPI
v4: fix some checkpatch error and warning
v5: add default with DEFINE_LOGLEVE_SETUP_DEF
KERN_APIC

usage:
in .h to have
#define KERN_PCI "<pci>"
in .c to have
DEFINE_LOGLEVEL_SETUP(pci, KERN_PCI, "pci:");
then could use
printk(KERN_DEBUG KERN_PCI fmt, ...);
and command line
loglevel=3,pci:8

you can add different printk to different files of one subsys if you like
not just one susbsys one tag, and don't need to update kernel.h to add more tags

YH


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