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  1. Nov 01, 2022
    • Michael Ellerman's avatar
      powerpc/32: Select ARCH_SPLIT_ARG64 · 02a771c9
      Michael Ellerman authored
      
      On 32-bit kernels, 64-bit syscall arguments are split into two
      registers. For that to work with syscall wrappers, the prototype of the
      syscall must have the argument split so that the wrapper macro properly
      unpacks the arguments from pt_regs.
      
      The fanotify_mark() syscall is one such syscall, which already has a
      split prototype, guarded behind ARCH_SPLIT_ARG64.
      
      So select ARCH_SPLIT_ARG64 to get that prototype and fix fanotify_mark()
      on 32-bit kernels with syscall wrappers.
      
      Note also that fanotify_mark() is the only usage of ARCH_SPLIT_ARG64.
      
      Fixes: 7e92e01b ("powerpc: Provide syscall wrapper")
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/20221101034852.2340319-1-mpe@ellerman.id.au
      02a771c9
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