Re: [PATCH 14/21] cpufreq: pxa2xx: initialize variables
From: Rafael J. Wysocki
Date: Thu Apr 25 2013 - 14:14:55 EST
On 4/25/2013 7:28 PM, Arnd Bergmann wrote:
gcc-3.8 correctly found that the variables set by find_freq_tables()
are not initialized if this function is called on something other
than a pxa2xx or pxa3xx:
pxa2xx-cpufreq.c: In function 'pxa_verify_policy':
pxa2xx-cpufreq.c:272:6: warning: 'pxa_freqs_table' may be used uninitialized in this function [-Wmaybe-uninitialized]
pxa2xx-cpufreq.c: In function 'pxa_set_target':
pxa2xx-cpufreq.c:345:23: warning: 'pxa_freq_settings' may be used uninitialized in this function [-Wmaybe-uninitialized]
Rather than adding a bogus initialization that would let us
get a little further before crashing, add an explicit BUG().
We know that this code is designed to run on only these cpus,
so this will fix the build warning and give a more helpful
diagnostic if the code ever changes to run on other machines.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
OK, applied.
Can you please CC future cpufreq changes to linux-pm@xxxxxxxxxxxxxxx?
That'd make the handling of them much easier.
Thanks,
Rafael
---
drivers/cpufreq/pxa2xx-cpufreq.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/pxa2xx-cpufreq.c b/drivers/cpufreq/pxa2xx-cpufreq.c
index fe4c55b..9e5bc8e 100644
--- a/drivers/cpufreq/pxa2xx-cpufreq.c
+++ b/drivers/cpufreq/pxa2xx-cpufreq.c
@@ -221,10 +221,11 @@ static void find_freq_tables(struct cpufreq_frequency_table **freq_table,
*pxa_freqs = pxa255_turbo_freqs;
*freq_table = pxa255_turbo_freq_table;
}
- }
- if (cpu_is_pxa27x()) {
+ } else if (cpu_is_pxa27x()) {
*pxa_freqs = pxa27x_freqs;
*freq_table = pxa27x_freq_table;
+ } else {
+ BUG();
}
}
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