linux-kernel - [PATCH] trace_syscalls: cleanup for syscalls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4B448499.6080609@cn.fujitsu.com>
Date:	Wed, 06 Jan 2010 20:39:53 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] trace_syscalls: cleanup for syscalls_metadata


NR_syscalls is compile-time constant.
so we allocates memory for syscalls_metadata at compile-time.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index f694f66..c7db995 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -17,7 +17,7 @@ static DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
 extern unsigned long __start_syscalls_metadata[];
 extern unsigned long __stop_syscalls_metadata[];
 
-static struct syscall_metadata **syscalls_metadata;
+static struct syscall_metadata *syscalls_metadata[NR_syscalls];
 
 static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
 {
@@ -45,7 +45,7 @@ static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
 
 static struct syscall_metadata *syscall_nr_to_meta(int nr)
 {
-	if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
+	if (nr >= NR_syscalls || nr < 0)
 		return NULL;
 
 	return syscalls_metadata[nr];
@@ -400,13 +400,6 @@ int __init init_ftrace_syscalls(void)
 	unsigned long addr;
 	int i;
 
-	syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
-					NR_syscalls, GFP_KERNEL);
-	if (!syscalls_metadata) {
-		WARN_ON(1);
-		return -ENOMEM;
-	}
-
 	for (i = 0; i < NR_syscalls; i++) {
 		addr = arch_syscall_addr(i);
 		meta = find_syscall_meta(addr);

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/