Re: [PATCH] bpf: Fix undeclared function 'barrier_nospec' warning

[Dave Hansen]

On 2/22/23 07:03, Geert Uytterhoeven wrote:
> On Wed, Feb 22, 2023 at 9:26 AM Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
>> Add the missing header for architectures that don't define
>> the barrier_nospec() macro. The nospec.h header is added after the
>> inclusion of barrier.h to avoid redefining the macro for architectures
>> that already define barrier_nospec() in their respective barrier.h
>> headers.
>>
>> Fixes: 74e19ef0ff80 ("uaccess: Add speculation barrier to copy_from_user()")
>> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
>> ---
>> Linus's master branch fails currently to build for arm64 without this commit.
> Not just arm64 🙁
> http://kisskb.ellerman.id.au/kisskb/head/5b7c4cabbb65f5c469464da6c5f614cbd7f730f2

Thanks for the fix, and sorry for the breakage, folks!  Obviously:

Tested-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

Now time to go make sure I have bpf turned on in all my cross builds.