sh: ftrace: Fix up syscall tracepoint support.
Sync up 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()) Taken from the s390 change. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -291,31 +291,48 @@ struct syscall_metadata *syscall_nr_to_meta(int nr)
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return syscalls_metadata[nr];
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}
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void arch_init_ftrace_syscalls(void)
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int syscall_name_to_nr(char *name)
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{
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int i;
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if (!syscalls_metadata)
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return -1;
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for (i = 0; i < NR_syscalls; i++)
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if (syscalls_metadata[i])
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if (!strcmp(syscalls_metadata[i]->name, name))
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return i;
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return -1;
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}
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void set_syscall_enter_id(int num, int id)
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{
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syscalls_metadata[num]->enter_id = id;
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}
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void set_syscall_exit_id(int num, int id)
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{
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syscalls_metadata[num]->exit_id = id;
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}
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static int __init arch_init_ftrace_syscalls(void)
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{
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int i;
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struct syscall_metadata *meta;
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unsigned long **psys_syscall_table = &sys_call_table;
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static atomic_t refs;
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if (atomic_inc_return(&refs) != 1)
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goto end;
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syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
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FTRACE_SYSCALL_MAX, GFP_KERNEL);
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if (!syscalls_metadata) {
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WARN_ON(1);
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return;
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return -ENOMEM;
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}
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for (i = 0; i < FTRACE_SYSCALL_MAX; i++) {
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meta = find_syscall_meta(psys_syscall_table[i]);
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syscalls_metadata[i] = meta;
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}
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return;
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/* Paranoid: avoid overflow */
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end:
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atomic_dec(&refs);
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return 0;
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}
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arch_initcall(arch_init_ftrace_syscalls);
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#endif /* CONFIG_FTRACE_SYSCALLS */
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