diff options
| author |   Michael Ellerman <mpe@ellerman.id.au> | 2022-11-01 14:48:52 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-11-01 15:27:12 +1100 |
| commit | 02a771c9a68a9f08cce4ec5e324fb1bc4dce7202 (patch) | |
| tree | 0069fb83f90fddca770ab08e8ce44cace1e398e2 /arch/powerpc/Kconfig | |
| parent | powerpc/32: fix syscall wrappers with 64-bit arguments (diff) | |
| download | linux-dev-02a771c9a68a9f08cce4ec5e324fb1bc4dce7202.tar.xz linux-dev-02a771c9a68a9f08cce4ec5e324fb1bc4dce7202.zip | |
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: 7e92e01b7245 ("powerpc: Provide syscall wrapper")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221101034852.2340319-1-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 20fb1765238c..2ca5418457ed 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -147,6 +147,7 @@ config PPC select ARCH_MIGHT_HAVE_PC_SERIO select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT + select ARCH_SPLIT_ARG64 if PPC32 select ARCH_STACKWALK select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x |