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SubjectRe: [PATCH] kasan: fix build for CONFIG_KASAN_HW_TAGS
On Sat, Jul 10, 2021 at 09:16:14PM +0200, Andrey Konovalov wrote:
> On Thu, Jul 8, 2021 at 4:44 PM Mark Rutland <mark.rutland@arm.com> wrote:
> >
> > When CONFIG_KASAN_HW_TAGS is selected, <linux/kasan.h> uses _RET_IP_,
> > but doesn't explicitly include <linux/kernel.h> where this is defined.
> >
> > We used to get this via a transitive include, but since commit:
> >
> > f39650de687e3576 ("kernel.h: split out panic and oops helpers")
> >
> > ... this is no longer the case, and so we get a build failure:
> >
> > | CC arch/arm64/mm/kasan_init.o
> > | In file included from arch/arm64/mm/kasan_init.c:10:
> > | ./include/linux/kasan.h: In function 'kasan_slab_free':
> > | ./include/linux/kasan.h:211:39: error: '_RET_IP_' undeclared (first use in this function)
> > | 211 | return __kasan_slab_free(s, object, _RET_IP_, init);
> > | | ^~~~~~~~
> > | ./include/linux/kasan.h:211:39: note: each undeclared identifier is reported only once for each function it appears in
> > | ./include/linux/kasan.h: In function 'kasan_kfree_large':
> > | ./include/linux/kasan.h:219:28: error: '_RET_IP_' undeclared (first use in this function)
> > | 219 | __kasan_kfree_large(ptr, _RET_IP_);
> > | | ^~~~~~~~
> > | ./include/linux/kasan.h: In function 'kasan_slab_free_mempool':
> > | ./include/linux/kasan.h:226:34: error: '_RET_IP_' undeclared (first use in this function)
> > | 226 | __kasan_slab_free_mempool(ptr, _RET_IP_);
> > | | ^~~~~~~~
> > | ./include/linux/kasan.h: In function 'kasan_check_byte':
> > | ./include/linux/kasan.h:277:35: error: '_RET_IP_' undeclared (first use in this function)
> > | 277 | return __kasan_check_byte(addr, _RET_IP_);
> > | | ^~~~~~~~
> >
> > Fix this by including <linux/kernel.h> explicitly.
>
> Hi Mark,
>
> Marco already sent a fix for this. It should be in the mm tree.
> (Although the link to it in the Andrew's notification email doesn't
> work. But they rarely do :)

Do you have a link to the patch? I couldn't spot it in linux-next.

Thanks,

Will

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