aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/jiffies.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/jiffies.h')
-rw-r--r--include/linux/jiffies.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index 7ba9e47bf061..e0b5b684d83f 100644
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -42,7 +42,7 @@
42/* LATCH is used in the interval timer and ftape setup. */ 42/* LATCH is used in the interval timer and ftape setup. */
43#define LATCH ((CLOCK_TICK_RATE + HZ/2) / HZ) /* For divider */ 43#define LATCH ((CLOCK_TICK_RATE + HZ/2) / HZ) /* For divider */
44 44
45/* Suppose we want to devide two numbers NOM and DEN: NOM/DEN, the we can 45/* Suppose we want to devide two numbers NOM and DEN: NOM/DEN, then we can
46 * improve accuracy by shifting LSH bits, hence calculating: 46 * improve accuracy by shifting LSH bits, hence calculating:
47 * (NOM << LSH) / DEN 47 * (NOM << LSH) / DEN
48 * This however means trouble for large NOM, because (NOM << LSH) may no 48 * This however means trouble for large NOM, because (NOM << LSH) may no
@@ -160,7 +160,7 @@ extern unsigned long preset_lpj;
160 * We want to do realistic conversions of time so we need to use the same 160 * We want to do realistic conversions of time so we need to use the same
161 * values the update wall clock code uses as the jiffies size. This value 161 * values the update wall clock code uses as the jiffies size. This value
162 * is: TICK_NSEC (which is defined in timex.h). This 162 * is: TICK_NSEC (which is defined in timex.h). This
163 * is a constant and is in nanoseconds. We will used scaled math 163 * is a constant and is in nanoseconds. We will use scaled math
164 * with a set of scales defined here as SEC_JIFFIE_SC, USEC_JIFFIE_SC and 164 * with a set of scales defined here as SEC_JIFFIE_SC, USEC_JIFFIE_SC and
165 * NSEC_JIFFIE_SC. Note that these defines contain nothing but 165 * NSEC_JIFFIE_SC. Note that these defines contain nothing but
166 * constants and so are computed at compile time. SHIFT_HZ (computed in 166 * constants and so are computed at compile time. SHIFT_HZ (computed in
@@ -204,7 +204,7 @@ extern unsigned long preset_lpj;
204 * operator if the result is a long long AND at least one of the 204 * operator if the result is a long long AND at least one of the
205 * operands is cast to long long (usually just prior to the "*" so as 205 * operands is cast to long long (usually just prior to the "*" so as
206 * not to confuse it into thinking it really has a 64-bit operand, 206 * not to confuse it into thinking it really has a 64-bit operand,
207 * which, buy the way, it can do, but it take more code and at least 2 207 * which, buy the way, it can do, but it takes more code and at least 2
208 * mpys). 208 * mpys).
209 209
210 * We also need to be aware that one second in nanoseconds is only a 210 * We also need to be aware that one second in nanoseconds is only a