> $   grep -R -i war /usr/src/linux  | wc -l
> 254169
> $   grep -R -i bug /usr/src/linux  | wc -l
> 261233

Над методикой исследования стоит поработать:

$ grep -Ri war /usr/src/linux | head
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/unistd.h: * This program is free software; you can redistribute it and/or modify
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/unistd.h: * only version 2 as published by the Free Software Foundation.
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/unistd.h: * but WITHOUT ANY WARRANTY; without even the implied warranty of
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/unistd.h: * along with this program; if not, write to the Free Software
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/bitsperlong.h: * This program is free software; you can redistribute it and/or modify
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/bitsperlong.h: * only version 2 as published by the Free Software Foundation.
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/bitsperlong.h: * but WITHOUT ANY WARRANTY; without even the implied warranty of
/usr/src/linux/tools/arch/hexagon/include/uapi/asm/bitsperlong.h: * along with this program; if not, write to the Free Software
/usr/src/linux/tools/arch/x86/lib/x86-opcode-map.txt:# - Intel(R) 64 and IA-32 Architectures Software Developer's Manual Vol.2C
/usr/src/linux/tools/arch/x86/lib/memcpy_64.S:    jl .Lcopy_backward

$ grep -Ri bug /usr/src/linux | head
/usr/src/linux/tools/arch/x86/tools/gen-insn-attr-x86.awk:function debug(msg) {
/usr/src/linux/tools/arch/x86/tools/gen-insn-attr-x86.awk:    print "DEBUG: " msg
/usr/src/linux/tools/arch/x86/include/asm/required-features.h:#define REQUIRED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 19)
/usr/src/linux/tools/arch/x86/include/asm/disabled-features.h:#define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 19)
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define NBUGINTS    1   /* N 32-bit bug flags */
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define X86_FEATURE_DE    ( 0*32+ 2) /* Debugging Extensions */
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define X86_FEATURE_DS    ( 0*32+21) /* "dts" Debug Store */
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define X86_FEATURE_DTES64        ( 4*32+ 2) /* 64-bit Debug Store */
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define X86_FEATURE_DSCPL        ( 4*32+ 4) /* "ds_cpl" CPL-qualified (filtered) Debug Store */
/usr/src/linux/tools/arch/x86/include/asm/cpufeatures.h:#define X86_FEATURE_SDBG( 4*32+11) /* Silicon Debug */