Commit ae07f551 authored by Ian Munsie's avatar Ian Munsie Committed by Steven Rostedt
Browse files

tracing/syscalls: Early terminate search for sys_ni_syscall

Many system calls are unimplemented and mapped to sys_ni_syscall, but at
boot ftrace would still search through every syscall metadata entry for
a match which wouldn't be there.

This patch adds causes the search to terminate early if the system call
is not mapped.
Signed-off-by: default avatarIan Munsie <>
LKML-Reference: <>
Signed-off-by: default avatarSteven Rostedt <>
parent b2d55496
......@@ -85,6 +85,9 @@ find_syscall_meta(unsigned long syscall)
stop = __stop_syscalls_metadata;
kallsyms_lookup(syscall, NULL, NULL, NULL, str);
if (arch_syscall_match_sym_name(str, "sys_ni_syscall"))
return NULL;
for ( ; start < stop; start++) {
if ((*start)->name && arch_syscall_match_sym_name(str, (*start)->name))
return *start;
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