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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-12 10:26:20 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-12 10:27:28 +0200
commit7aa79f948749da7de3de0c427e9c9ee0ff595243 (patch)
tree5218d7b085e447165639081c49ceedafacc74ce5
parent8ebf975608aaebd7feb33d77f07ba21a6380e086 (diff)
[S390] vdso: kernel parameter syntax
The syntax of the vdso kernel parameter is documented as vdso=[on|off]. The implementation uses vdso=[0|1], an invalid parameter string disables the vdso support. Fix the mismatch by adding vdso=[on|off] as additional parameter syntax. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/kernel/vdso.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 89b2e7f1b7a..7b76ee4fb16 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -53,8 +53,19 @@ unsigned int __read_mostly vdso_enabled = 1;
static int __init vdso_setup(char *s)
{
- vdso_enabled = simple_strtoul(s, NULL, 0);
- return 1;
+ unsigned long val;
+ int rc;
+
+ rc = 0;
+ if (strncmp(s, "on", 3) == 0)
+ vdso_enabled = 1;
+ else if (strncmp(s, "off", 4) == 0)
+ vdso_enabled = 0;
+ else {
+ rc = strict_strtoul(s, 0, &val);
+ vdso_enabled = rc ? 0 : !!val;
+ }
+ return !rc;
}
__setup("vdso=", vdso_setup);