On Mon, Mar 22, 2021 at 11:30:07PM -0000, tip-bot2 for Arnd Bergmann wrote: > The following commit has been merged into the locking/core branch of tip: > > Commit-ID: 335c73e7c8f7deb23537afbbbe4f8ab48bd5de52 > Gitweb: > https://git.kernel.org/tip/335c73e7c8f7deb23537afbbbe4f8ab48bd5de52 > Author: Arnd Bergmann <[email protected]> > AuthorDate: Mon, 22 Mar 2021 22:42:24 +01:00 > Committer: Ingo Molnar <[email protected]> > CommitterDate: Tue, 23 Mar 2021 00:08:53 +01:00 > > static_call: Fix function type mismatch > > The __static_call_return0() function is declared to return a 'long', > while it aliases a couple of functions that all return 'int'. When > building with 'make W=1', gcc warns about this: > > kernel/sched/core.c:5420:37: error: cast between incompatible function > types from 'long int (*)(void)' to 'int (*)(void)' > [-Werror=cast-function-type] > 5420 | static_call_update(might_resched, (typeof(&__cond_resched)) > __static_call_return0); > > Change all these function to return 'long' as well, but remove the cast to > ensure we get a warning if any of the types ever change. > > Signed-off-by: Arnd Bergmann <[email protected]> > Signed-off-by: Ingo Molnar <[email protected]> > Link: https://lore.kernel.org/r/[email protected]
So I strongly disagree and think the warning is bad and should be disabled. I'll go uncommit this patch.
