On Tue, Jul 9, 2019 at 8:46 PM Marco Elver <[email protected]> wrote:
>
> On Tue, 9 Jul 2019 at 20:36, Arnd Bergmann <[email protected]> wrote:
> >
> > The kasan_check_read() is marked 'inline', which usually includes
> > the 'always_inline' attribute. In some configuration, gcc decides that
> > it cannot inline this, causing a build failure:
> >
> > In file included from include/linux/compiler.h:257,
> > from arch/x86/include/asm/current.h:5,
> > from include/linux/sched.h:12,
> > from include/linux/ratelimit.h:6,
> > from fs/dcache.c:18:
> > include/linux/compiler.h: In function 'read_word_at_a_time':
> > include/linux/kasan-checks.h:31:20: error: inlining failed in call to
> > always_inline 'kasan_check_read': function attribute mismatch
> > static inline bool kasan_check_read(const volatile void *p, unsigned int
> > size)
> > ^~~~~~~~~~~~~~~~
> > In file included from arch/x86/include/asm/current.h:5,
> > from include/linux/sched.h:12,
> > from include/linux/ratelimit.h:6,
> > from fs/dcache.c:18:
> > include/linux/compiler.h:280:2: note: called from here
> > kasan_check_read(addr, 1);
> > ^~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > While I have no idea why it does this, but changing the call to the
> > internal __kasan_check_read() fixes the issue.
>
> Thanks, this was fixed more generally in v5:
> http://lkml.kernel.org/r/[email protected]
Ok, that looks like a better solution indeed. I tried something
similar at first but got it wrong.
Arnd
