diff mbox

[11/22] cpufreq: Replace strnicmp with strncasecmp

Message ID 1410900696-6481-12-git-send-email-linux@rasmusvillemoes.dk (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Rasmus Villemoes Sept. 16, 2014, 8:51 p.m. UTC
The kernel used to contain two functions for length-delimited,
case-insensitive string comparison, strnicmp with correct semantics
and a slightly buggy strncasecmp. The latter is the POSIX name, so
strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper
for the new strncasecmp to avoid breaking existing users.

To allow the compat wrapper strnicmp to be removed at some point in
the future, and to avoid the extra indirection cost, do
s/strnicmp/strncasecmp/g.

Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 drivers/cpufreq/cpufreq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Viresh Kumar Sept. 16, 2014, 9:22 p.m. UTC | #1
On 16 September 2014 13:51, Rasmus Villemoes <linux@rasmusvillemoes.dk> wrote:
> The kernel used to contain two functions for length-delimited,
> case-insensitive string comparison, strnicmp with correct semantics
> and a slightly buggy strncasecmp. The latter is the POSIX name, so
> strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper
> for the new strncasecmp to avoid breaking existing users.
>
> To allow the compat wrapper strnicmp to be removed at some point in
> the future, and to avoid the extra indirection cost, do
> s/strnicmp/strncasecmp/g.
>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Cc: linux-pm@vger.kernel.org
> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> ---
>  drivers/cpufreq/cpufreq.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Not really sure about the implementation of these routines but the
changes look fine.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

--
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Rafael J. Wysocki Sept. 25, 2014, 11:53 p.m. UTC | #2
On Tuesday, September 16, 2014 02:22:49 PM Viresh Kumar wrote:
> On 16 September 2014 13:51, Rasmus Villemoes <linux@rasmusvillemoes.dk> wrote:
> > The kernel used to contain two functions for length-delimited,
> > case-insensitive string comparison, strnicmp with correct semantics
> > and a slightly buggy strncasecmp. The latter is the POSIX name, so
> > strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper
> > for the new strncasecmp to avoid breaking existing users.
> >
> > To allow the compat wrapper strnicmp to be removed at some point in
> > the future, and to avoid the extra indirection cost, do
> > s/strnicmp/strncasecmp/g.
> >
> > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> > Cc: Viresh Kumar <viresh.kumar@linaro.org>
> > Cc: linux-pm@vger.kernel.org
> > Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> > ---
> >  drivers/cpufreq/cpufreq.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> Not really sure about the implementation of these routines but the
> changes look fine.
> 
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

Queued up for 3.18, thanks!
diff mbox

Patch

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d9fdedd..3330f51 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -437,7 +437,7 @@  static struct cpufreq_governor *__find_governor(const char *str_governor)
 	struct cpufreq_governor *t;
 
 	list_for_each_entry(t, &cpufreq_governor_list, governor_list)
-		if (!strnicmp(str_governor, t->name, CPUFREQ_NAME_LEN))
+		if (!strncasecmp(str_governor, t->name, CPUFREQ_NAME_LEN))
 			return t;
 
 	return NULL;
@@ -455,10 +455,10 @@  static int cpufreq_parse_governor(char *str_governor, unsigned int *policy,
 		goto out;
 
 	if (cpufreq_driver->setpolicy) {
-		if (!strnicmp(str_governor, "performance", CPUFREQ_NAME_LEN)) {
+		if (!strncasecmp(str_governor, "performance", CPUFREQ_NAME_LEN)) {
 			*policy = CPUFREQ_POLICY_PERFORMANCE;
 			err = 0;
-		} else if (!strnicmp(str_governor, "powersave",
+		} else if (!strncasecmp(str_governor, "powersave",
 						CPUFREQ_NAME_LEN)) {
 			*policy = CPUFREQ_POLICY_POWERSAVE;
 			err = 0;