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SubjectRe: [PATCH 2/7] wire up sys_time_change_notify() on ARM
Alexander Shishkin writes:
> sys_time_change_notify() is a new syscall with number and types of
> parameters such that no ARM-specific processing is needed.
>
> Tested with 2.6.36-rc3 using Documentation/time-change-notify-example.c.
>
> Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
> CC: Russell King <linux@arm.linux.org.uk>
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: David Howells <dhowells@redhat.com>
> CC: Christoph Hellwig <hch@lst.de>
> CC: "H. Peter Anvin" <hpa@zytor.com>
> CC: linux-arm-kernel@lists.infradead.org
> CC: linux-kernel@vger.kernel.org
> ---
> arch/arm/include/asm/unistd.h | 1 +
> arch/arm/kernel/calls.S | 1 +
> 2 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
> index d02cfb6..ce38a6f 100644
> --- a/arch/arm/include/asm/unistd.h
> +++ b/arch/arm/include/asm/unistd.h
> @@ -393,6 +393,7 @@
> #define __NR_perf_event_open (__NR_SYSCALL_BASE+364)
> #define __NR_recvmmsg (__NR_SYSCALL_BASE+365)
> #define __NR_accept4 (__NR_SYSCALL_BASE+366)
> +#define __NR_time_change_notify (__NR_SYSCALL_BASE+367)
>
> /*
> * The following SWIs are ARM private.
> diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
> index afeb71f..f1e64ba 100644
> --- a/arch/arm/kernel/calls.S
> +++ b/arch/arm/kernel/calls.S
> @@ -376,6 +376,7 @@
> CALL(sys_perf_event_open)
> /* 365 */ CALL(sys_recvmmsg)
> CALL(sys_accept4)
> + CALL(sys_time_change_notify)
> #ifndef syscalls_counted
> .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
> #define syscalls_counted

No, you need to use 370 as the syscall number on ARM as 367-369
have been assigned to the fanotify and prlimit64 syscalls; see

http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=6343/1

/Mikael


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