summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/media/dvb-core/dvb_math.h
diff options
context:
space:
mode:
authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/media/dvb-core/dvb_math.h
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/media/dvb-core/dvb_math.h')
-rw-r--r--kernel/drivers/media/dvb-core/dvb_math.h25
1 files changed, 15 insertions, 10 deletions
diff --git a/kernel/drivers/media/dvb-core/dvb_math.h b/kernel/drivers/media/dvb-core/dvb_math.h
index aecc867e9..34dc1df03 100644
--- a/kernel/drivers/media/dvb-core/dvb_math.h
+++ b/kernel/drivers/media/dvb-core/dvb_math.h
@@ -25,33 +25,38 @@
#include <linux/types.h>
/**
- * computes log2 of a value; the result is shifted left by 24 bits
+ * cintlog2 - computes log2 of a value; the result is shifted left by 24 bits
+ *
+ * @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* intlog2(value) = intlog2(value * 2^x) - x * 2^24
*
- * example: intlog2(8) will give 3 << 24 = 3 * 2^24
- * example: intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
- * example: intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
+ * Some usecase examples:
+ * intlog2(8) will give 3 << 24 = 3 * 2^24
+ * intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
+ * intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
+ *
*
- * @param value The value (must be != 0)
- * @return log2(value) * 2^24
+ * return: log2(value) * 2^24
*/
extern unsigned int intlog2(u32 value);
/**
- * computes log10 of a value; the result is shifted left by 24 bits
+ * intlog10 - computes log10 of a value; the result is shifted left by 24 bits
+ *
+ * @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* intlog10(value) = intlog10(value * 10^x) - x * 2^24
*
- * example: intlog10(1000) will give 3 << 24 = 3 * 2^24
+ * An usecase example:
+ * intlog10(1000) will give 3 << 24 = 3 * 2^24
* due to the implementation intlog10(1000) might be not exactly 3 * 2^24
*
* look at intlog2 for similar examples
*
- * @param value The value (must be != 0)
- * @return log10(value) * 2^24
+ * return: log10(value) * 2^24
*/
extern unsigned int intlog10(u32 value);