(replying to an old thread but renaming it) Kalle Valo <kvalo@xxxxxxxxxxxxxx> writes: > "Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx> wrote: > >> In preparation to enabling -Wimplicit-fallthrough, mark switch cases >> where we are expecting to fall through. >> >> Notice that in this particular case, I replaced "pass through" with >> a proper "fall through" comment, which is what GCC is expecting >> to find. >> >> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx> >> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> > > Patch applied to ath-next branch of ath.git, thanks. > > f1d270ae10ff ath10k: htt_tx: mark expected switch fall-throughs Gustavo, I enabled W=1 on my ath10k build checks and it took me a while to figure out why GCC was warning about fall through annotations missing even I knew you had fixed them. Finally I figured out that the reason was ccache, which I need because I work with different branches and need to recompile the kernel quite often. If the plan is to enable -Wimplicit-fallthrough by default in the kernel IMHO this might become an issue, as otherwise people using ccache start seeing lots of invalid warnings. Apparently CCACHE_COMMENTS=1 will fix that but my version of ccache doesn't support it, and how would everyone learn that trick anyway? Or maybe CCACHE_COMMENTS can enabled through kernel Makefile? -- Kalle Valo
