On Mon, 6 Jan 2014, Nicholas Mc Guire wrote:
during Linux kernel build I got the following build warning kernel/trace/trace.c: In function 'tracing_mark_write': kernel/trace/trace.c:3818: warning: 'page2' may be used uninitialized in this function after looking at this function I was not able to figure out how this uninitialized usage could happen - all access to page2 is "protected" by an "if (nr_pages == 2)" so no uninitialized access should be possible.
Note the word "may": gcc isn't able (at least at this optimization level) to prove that page2 is always initialized before use, so it warns.
is there some way to make gcc happy here ?
Initialize page2 to 0 where you declare it? -- Marc Glisse
