Messages in this thread Patch in this message | | | Date | Tue, 25 Aug 2009 14:31:11 +0200 | From | Hendrik Brueckner <> | Subject | Re: [PATCH 00/12] add syscall tracepoints V3 - s390 arch update |
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Hi,
I looked at your recent syscall tracepoint patches and I have few more s390 arch updates.
This patch includes s390 arch updates for: - tracing: Map syscall name to number (syscall_name_to_nr()) - tracing: Call arch_init_ftrace_syscalls at boot - tracing: add support traceopint ids (set_syscall_{enter,exit}_id())
The patch already uses "NR_syscalls" instead of FTRACE_SYSCALL_MAX.
The patch is based on today's linux-next (20090825). Since few of your patches already include s390 changes, I would appreciate if you could add the patch to your patch set.
If you have any remarks, please let me know. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> --- arch/s390/include/asm/ftrace.h | 4 ++++ arch/s390/kernel/ftrace.c | 36 +++++++++++++++++++++++++++--------- 2 files changed, 31 insertions(+), 9 deletions(-)
--- a/arch/s390/kernel/ftrace.c +++ b/arch/s390/kernel/ftrace.c @@ -220,6 +220,29 @@ struct syscall_metadata *syscall_nr_to_m 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_sys 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
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