Commit 02a771c9 authored by Michael Ellerman's avatar Michael Ellerman

powerpc/32: Select ARCH_SPLIT_ARG64

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
parent ce883a2b
...@@ -147,6 +147,7 @@ config PPC ...@@ -147,6 +147,7 @@ config PPC
select ARCH_MIGHT_HAVE_PC_SERIO select ARCH_MIGHT_HAVE_PC_SERIO
select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
select ARCH_SPLIT_ARG64 if PPC32
select ARCH_STACKWALK select ARCH_STACKWALK
select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x
......
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