Hi Andy,
Sorry for late response. I will take your suggestion in next version.
Thanks
Yisheng
On 2018/6/6 13:01, Andy Shevchenko wrote:
> On Wed, Jun 6, 2018 at 5:19 AM, Yisheng Xie <xieyisheng1@xxxxxxxxxx> wrote:
>> match_string() returns the index of an array for a matching string,
>> which can be used instead of open coded variant.
>>
>
> Thanks for an update.
> My comments below.
>
> I think you need to mentioned the string literal change in the commit message.
>
>> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
>> Cc: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>
>> Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
>> Cc: sparclinux@xxxxxxxxxxxxxxx
>> Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
>> ---
>> v3:
>> - add string literal instead of NULL for array hwcaps to make it
>> can use match_string() too. - per Andy
>> v2
>> - new add for use match_string() helper patchset.
>>
>> arch/sparc/kernel/setup_64.c | 23 +++++++++--------------
>> 1 file changed, 9 insertions(+), 14 deletions(-)
>>
>> diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
>> index 7944b3c..4f0ec0c 100644
>> --- a/arch/sparc/kernel/setup_64.c
>> +++ b/arch/sparc/kernel/setup_64.c
>> @@ -401,7 +401,7 @@ void __init start_early_boot(void)
>> */
>> "mul32", "div32", "fsmuld", "v8plus", "popc", "vis", "vis2",
>> "ASIBlkInit", "fmaf", "vis3", "hpc", "random", "trans", "fjfmau",
>> - "ima", "cspare", "pause", "cbcond", NULL /*reserved for crypto */,
>> + "ima", "cspare", "pause", "cbcond", "resv" /*reserved for crypto */,
>> "adp",
>
> Why not to spell "crypto" explicitly and remove comment?
>
>> };
>>
>> @@ -418,7 +418,7 @@ void cpucap_info(struct seq_file *m)
>> seq_puts(m, "cpucaps\t\t: ");
>> for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
>> unsigned long bit = 1UL << i;
>> - if (hwcaps[i] && (caps & bit)) {
>> + if (bit != HWCAP_SPARC_CRYPTO && (caps & bit)) {
>
> I would rather swap the order of subsonditions to check if caps has a
> bit first, and then exclude CRYPTO.
>
>> seq_printf(m, "%s%s",
>> printed ? "," : "", hwcaps[i]);
>> printed++;
>> @@ -472,7 +472,7 @@ static void __init report_hwcaps(unsigned long caps)
>>
>> for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
>> unsigned long bit = 1UL << i;
>> - if (hwcaps[i] && (caps & bit))
>> + if (bit != HWCAP_SPARC_CRYPTO && (caps & bit))
>> report_one_hwcap(&printed, hwcaps[i]);
>
> Ditto.
>
>> }
>> if (caps & HWCAP_SPARC_CRYPTO)
>> @@ -504,18 +504,13 @@ static unsigned long __init mdesc_cpu_hwcap_list(void)
>> while (len) {
>> int i, plen;
>>
>> - for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
>> - unsigned long bit = 1UL << i;
>> + i = match_string(hwcaps, ARRAY_SIZE(hwcaps), prop);
>> + if (i >= 0)
>> + caps |= (1UL << i);
>
> Parens are redundant (and actually didn't present in the original code above).
>
>>
>> - if (hwcaps[i] && !strcmp(prop, hwcaps[i])) {
>> - caps |= bit;
>> - break;
>> - }
>> - }
>> - for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {
>> - if (!strcmp(prop, crypto_hwcaps[i]))
>> - caps |= HWCAP_SPARC_CRYPTO;
>> - }
>> + i = match_string(crypto_hwcaps, ARRAY_SIZE(crypto_hwcaps), prop);
>> + if (i >= 0)
>> + caps |= HWCAP_SPARC_CRYPTO;
>>
>> plen = strlen(prop) + 1;
>> prop += plen;
>> --
>> 1.7.12.4
>>
>>
>>
>
>
>
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