Speaking of bool (and I'm not a fan of it either), is this warning
just noise (which is bad enough since it masks real warnings), or is
this going to cause serious problems?
CHECK /usr/projects/linux/ext4/kernel/trace/trace.c
/usr/projects/linux/ext4/kernel/trace/trace.c:559:6: warning: symbol
'free_snapshot' was not declared. Should it be static?
/usr/projects/linux/ext4/kernel/trace/trace.c:1489:14: warning: expression
using sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1489:14: warning: expression
using sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1489:14: warning: expression
using sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1489:14: warning: expression
using sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1492:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1492:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1492:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1492:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1539:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1539:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1539:9: warning: expression using
sizeof bool
/usr/projects/linux/ext4/kernel/trace/trace.c:1539:9: warning: expression using
sizeof bool
(i.e., is a C compiler allowed to pack multiple bools stored in a data
structure into a single byte, with potentially hilarious results for C
code trying to do magic utilizing sizeof and offsetof (which some of
our kernel macros do use, IIRC)?
- Ted
P.S. BTW, this is not the only set of sparse warnings that are
emitted by files in kernel/trace/*; maybe it would be good if the
ftrace maintianers worked on nuking them all? There are also a bunch
of warnings like which I've only recently learned indicated potential
RCU bugs:
/usr/projects/linux/ext4/kernel/trace/trace.c:1885:17: warning: incorrect type
in assignment (different address spaces)
/usr/projects/linux/ext4/kernel/trace/trace.c:1885:17: expected struct
trace_buffer_struct *buffers
/usr/projects/linux/ext4/kernel/trace/trace.c:1885:17: got struct
trace_buffer_struct [noderef] <asn:3>*<noident>
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