Re: [PATCH 4/8] asm-generic: Make time32 syscall numbers optional
From: Geert Uytterhoeven
Date: Tue Feb 19 2019 - 15:06:24 EST
On Tue, Feb 19, 2019 at 3:34 AM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> We don't want new architectures to even provide the old 32-bit time_t
> based system calls any more, or define the syscall number macros.
> Add a new __ARCH_WANT_TIME32_SYSCALLS macro that gets enabled for all
> existing 32-bit architectures so we don't change any current behavior.
... (only) 32-bit architectures using the generic syscall list, right?
> Since this symbol is evaluated in user space as well, we cannot use
> a Kconfig CONFIG_* macro but have to define it in uapi/asm/unistd.h.
> On 64-bit architectures, the same system call numbers mostly refer to
> the system calls we want to keep, as they already pass 64-bit time_t.
> As new architectures no longer provide these, we need new exceptions
> in checksyscalls.sh.
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> arch/arc/include/uapi/asm/unistd.h | 1 +
> arch/arm64/include/uapi/asm/unistd.h | 1 +
> arch/c6x/include/uapi/asm/unistd.h | 1 +
> arch/csky/include/uapi/asm/unistd.h | 1 +
> arch/h8300/include/uapi/asm/unistd.h | 1 +
> arch/hexagon/include/uapi/asm/unistd.h | 1 +
> arch/nds32/include/uapi/asm/unistd.h | 1 +
> arch/nios2/include/uapi/asm/unistd.h | 1 +
> arch/openrisc/include/uapi/asm/unistd.h | 1 +
> arch/riscv/include/uapi/asm/unistd.h | 3 ++
> arch/unicore32/include/uapi/asm/unistd.h | 1 +
> include/uapi/asm-generic/unistd.h | 36 ++++++++++++++++++++++++
> scripts/checksyscalls.sh | 7 +++++
> 13 files changed, 56 insertions(+)
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds