lkml.org 
[lkml]   [2005]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[RFC][PATCH 1/4] add jiffies_to_nsecs() helper and fix up size of usecs
    From: Nishanth Aravamudan <nacc@us.ibm.com>

    Description: Add a jiffies_to_nsecs() helper function. Make consistent
    the size of microseconds (unsigned long) throughout the conversion
    functions.

    Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>

    ---

    jiffies.h | 15 +++++++++++++--
    1 files changed, 13 insertions(+), 2 deletions(-)

    diff -urpN 2.6.13-rc3-base/include/linux/jiffies.h 2.6.13-rc3-dev/include/linux/jiffies.h
    --- 2.6.13-rc3-base/include/linux/jiffies.h 2005-03-01 23:37:31.000000000 -0800
    +++ 2.6.13-rc3-dev/include/linux/jiffies.h 2005-07-14 12:43:44.000000000 -0700
    @@ -263,7 +263,7 @@ static inline unsigned int jiffies_to_ms
    #endif
    }

    -static inline unsigned int jiffies_to_usecs(const unsigned long j)
    +static inline unsigned long jiffies_to_usecs(const unsigned long j)
    {
    #if HZ <= 1000000 && !(1000000 % HZ)
    return (1000000 / HZ) * j;
    @@ -274,6 +274,17 @@ static inline unsigned int jiffies_to_us
    #endif
    }

    +static inline u64 jiffies_to_nsecs(const unsigned long j)
    +{
    +#if HZ <= NSEC_PER_SEC && !(NSEC_PER_SEC % HZ)
    + return (NSEC_PER_SEC / HZ) * (u64)j;
    +#elif HZ > NSEC_PER_SEC && !(HZ % NSEC_PER_SEC)
    + return ((u64)j + (HZ / NSEC_PER_SEC) - 1)/(HZ / NSEC_PER_SEC);
    +#else
    + return ((u64)j * NSEC_PER_SEC) / HZ;
    +#endif
    +}
    +
    static inline unsigned long msecs_to_jiffies(const unsigned int m)
    {
    if (m > jiffies_to_msecs(MAX_JIFFY_OFFSET))
    @@ -287,7 +298,7 @@ static inline unsigned long msecs_to_jif
    #endif
    }

    -static inline unsigned long usecs_to_jiffies(const unsigned int u)
    +static inline unsigned long usecs_to_jiffies(const unsigned long u)
    {
    if (u > jiffies_to_usecs(MAX_JIFFY_OFFSET))
    return MAX_JIFFY_OFFSET;
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/
    \
     
     \ /
      Last update: 2005-07-14 22:49    [W:0.030 / U:0.072 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site