Report inlining location when using __attribute__((__warning__(msg))) #1571
Description
When __warning__(msg) reports from usage within an inline, there's no information about where the inline was used. For example:
gcc says inlined from 'main' at /app/example.c
In file included from /app/example.c:5: In function 'indirection', inlined from 'main' at /app/example.c:9:5: example.h:6:9: error: call to '__write_overflow' declared with attribute warning: eek [-Werror=attribute-warning] 6 | __write_overflow(); | ^~~~~~~~~~~~~~~~~~ Clang doesn't include that hint:
In file included from /app/example.c:5: example.h:6:9: error: call to __write_overflow declared with 'warning' attribute: eek [-Werror,-Wattribute-warning] __write_overflow(); ^ https://godbolt.org/z/W9PjxsE6z
Which makes FORTIFY_SOURCE warnings much harder to find. :)
In file included from net/mptcp/protocol.c:10: In file included from ./include/linux/module.h:13: In file included from ./include/linux/stat.h:19: In file included from ./include/linux/time.h:60: In file included from ./include/linux/time32.h:13: In file included from ./include/linux/timex.h:65: In file included from ./arch/x86/include/asm/timex.h:5: In file included from ./arch/x86/include/asm/processor.h:22: In file included from ./arch/x86/include/asm/msr.h:11: In file included from ./arch/x86/include/asm/cpumask.h:5: In file included from ./include/linux/cpumask.h:12: In file included from ./include/linux/bitmap.h:11: In file included from ./include/linux/string.h:253: ./include/linux/fortify-string.h:230:4: warning: call to __write_overflow_field declared with 'warning' attribute: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning] __write_overflow_field(p_size_field, size); ^