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    SubjectRe: [PATCH 1/7] tracing: Add syscall tracepoints - s390 arch update
    Oh, I forgot to put the
    Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> on this one.

    Sorry...


    On Thu, Aug 27, 2009 at 07:43:29PM +0200, Frederic Weisbecker wrote:
    > From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
    >
    > This patch includes s390 arch updates to synchronize with latest
    > core changes in the syscalls tracing area.
    >
    > - tracing: Map syscall name to number (syscall_name_to_nr())
    > - tracing: Call arch_init_ftrace_syscalls at boot
    > - tracing: add support tracepoint ids (set_syscall_{enter,exit}_id())
    >
    > Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
    > Cc: Jason Baron <jbaron@redhat.com>
    > Cc: Frederic Weisbecker <fweisbec@gmail.com>
    > Cc: Ingo Molnar <mingo@elte.hu>
    > Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
    > Cc: Steven Rostedt <rostedt@goodmis.org>
    > 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: Martin Schwidefsky <schwidefsky@de.ibm.com>
    > Cc: Paul Mundt <lethal@linux-sh.org>
    > LKML-Reference: <20090825123111.GD4639@cetus.boeblingen.de.ibm.com>
    > Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
    > ---
    > arch/s390/kernel/ftrace.c | 36 +++++++++++++++++++++++++++---------
    > 1 files changed, 27 insertions(+), 9 deletions(-)
    >
    > diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
    > index 3e298e6..57bdcb1 100644
    > --- a/arch/s390/kernel/ftrace.c
    > +++ b/arch/s390/kernel/ftrace.c
    > @@ -220,6 +220,29 @@ struct syscall_metadata *syscall_nr_to_meta(int nr)
    > return syscalls_metadata[nr];
    > }
    >
    > +int syscall_name_to_nr(char *name)
    > +{
    > + int i;
    > +
    > + if (!syscalls_metadata)
    > + return -1;
    > + for (i = 0; i < NR_syscalls; i++)
    > + if (syscalls_metadata[i])
    > + if (!strcmp(syscalls_metadata[i]->name, name))
    > + return i;
    > + return -1;
    > +}
    > +
    > +void set_syscall_enter_id(int num, int id)
    > +{
    > + syscalls_metadata[num]->enter_id = id;
    > +}
    > +
    > +void set_syscall_exit_id(int num, int id)
    > +{
    > + syscalls_metadata[num]->exit_id = id;
    > +}
    > +
    > static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
    > {
    > struct syscall_metadata *start;
    > @@ -237,24 +260,19 @@ static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
    > return NULL;
    > }
    >
    > -void arch_init_ftrace_syscalls(void)
    > +static int __init arch_init_ftrace_syscalls(void)
    > {
    > struct syscall_metadata *meta;
    > int i;
    > - static atomic_t refs;
    > -
    > - if (atomic_inc_return(&refs) != 1)
    > - goto out;
    > syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
    > GFP_KERNEL);
    > if (!syscalls_metadata)
    > - goto out;
    > + return -ENOMEM;
    > for (i = 0; i < NR_syscalls; i++) {
    > meta = find_syscall_meta((unsigned long)sys_call_table[i]);
    > syscalls_metadata[i] = meta;
    > }
    > - return;
    > -out:
    > - atomic_dec(&refs);
    > + return 0;
    > }
    > +arch_initcall(arch_init_ftrace_syscalls);
    > #endif
    > --
    > 1.6.2.3
    >



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