Debug stream debugfs #7726

Job	Run time
Sparse check	3m 4s
GCC static -fanalyzer	4m 2s
Clang build x86_64	4m 33s
GCC build X86_64 with W=1	3m 11s
GCC build arm64 allmodconfig	2m 36s
GCC build i386	16m 31s
GCC build X86_64 with W=1 allmodconfig	1m 45s
GCC build X86_64	17m 47s
GCC build arm64	21m 16s
	1h 14m 45s

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