Re: [PATCH 6.18 000/212] 6.18.20-rc1 review

On Mon, 23 Mar 2026 14:43:41 +0100 Greg Kroah-Hartman <[email protected]> wrote:
>
> This is the start of the stable review cycle for the 6.18.20 release.
> There are 212 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 25 Mar 2026 13:44:33 +0000.
> Anything received after that time might be too late.

Boot-tested under QEMU for Rust x86_64, arm64 and riscv64; built-tested
for loongarch64:

Tested-by: Miguel Ojeda <[email protected]>

For UML, I am seeing:

    In file included from kernel/fork.c:108:
    In file included from ./include/linux/unwind_deferred.h:6:
    In file included from ./include/linux/unwind_user.h:6:
    ./arch/x86/include/asm/unwind_user.h:23:12: error: no member named 'flags' in 'struct pt_regs'
       23 |         if (regs->flags & X86_VM_MASK)
          |             ~~~~  ^
    ./arch/x86/include/asm/unwind_user.h:23:20: error: use of undeclared identifier 'X86_VM_MASK'
       23 |         if (regs->flags & X86_VM_MASK)
          |                           ^
    ./arch/x86/include/asm/unwind_user.h:26:7: error: call to undeclared function 'user_64bit_mode'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
       26 |         if (!user_64bit_mode(regs))
          |              ^

We probably need at least:

  aa7387e79a5c ("unwind_user/x86: Fix arch=um build")

Or perhaps the split of the guards added later.

Cc: Peter Zijlstra (Intel) <[email protected]>
Cc: Ingo Molnar <[email protected]>

Cc: Richard Weinberger <[email protected]>
Cc: Anton Ivanov <[email protected]>
Cc: Johannes Berg <[email protected]>
Cc: [email protected]

I hope that helps!

Cheers,
Miguel