diff options
author | Jason Baron <jbaron@redhat.com> | 2009-08-26 20:09:10 +0400 |
---|---|---|
committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-08-26 23:29:58 +0400 |
commit | a5a2f8e2acb991327952c45a13f5441fc09dffd6 (patch) | |
tree | 6707f1b387132a19a1f1a8ff39c6df6405400183 /arch/x86/kernel/ftrace.c | |
parent | dd86dda24cc1dc70031a7d9250dc3c0c430a50e2 (diff) | |
download | linux-a5a2f8e2acb991327952c45a13f5441fc09dffd6.tar.xz |
tracing: Define NR_syscalls for x86_64
Express the available number of syscalls in a standard way by defining
NR_syscalls.
The common way to define it is to place its definition in asm/unistd.h
However, the number of syscalls is defined using __NR_syscall_max in
x86-64 after building a dynamic header file "asm-offsets.h"
The source file that generates this header, asm-offsets-64.c includes
unistd.h, then if we want to express NR_syscalls from __NR_syscall_max
in unistd.h only after generating the dynamic header file, we need a
watchguard.
If unistd.h is included from asm-offsets-64.c, then we are generating
asm-offset.h which defines __NR_syscall_max. At this time, we don't
want to (we can't) define NR_syscalls, then we do nothing.
Otherwise we define NR_syscalls because we know asm-offsets.h has
been generated.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Josh Stone <jistone@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anwin <hpa@zytor.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
LKML-Reference: <20090826160910.GB2658@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
0 files changed, 0 insertions, 0 deletions