[patch 0/4] make pr_debug() dynamic

[Jason Baron]

hi,

make the pr_debug() function dependent upon the new immediate infrastruture.
Thus, b/c of the low runtime impact, we can dynamically enable/disable
pr_debug withoug recompiling. Patch allows 'pr_debug=0/1' on the command
line or via /proc/sys/debug/pr_debug.

thanks,

-Jason

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