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SubjectRe: [PATCH 1/5] logger: Change logger_offset() from macro to function
From
small style nit otherwise looks ok.

On Tue, Feb 7, 2012 at 6:21 PM, Tim Bird <tim.bird@am.sony.com> wrote:
> Convert to function and add log as a parameter, rather than relying
> on log in the context of the macro.
>
> Signed-off-by: Tim Bird <tim.bird@am.sony.com>
> ---
>  drivers/staging/android/logger.c |   16 ++++++++++------
>  1 files changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c
> index ffc2d04..92456d7 100644
> --- a/drivers/staging/android/logger.c
> +++ b/drivers/staging/android/logger.c
> @@ -60,7 +60,11 @@ struct logger_reader {
>  };
>
>  /* logger_offset - returns index 'n' into the log via (optimized) modulus */
> -#define logger_offset(n)       ((n) & (log->size - 1))
> +size_t logger_offset(struct logger_log *log, size_t n)
> +{
> +       return n & (log->size-1);

spaces around -

> +}
> +
>
>  /*
>  * file_get_log - Given a file structure, return the associated log
> @@ -137,7 +141,7 @@ static ssize_t do_read_log_to_user(struct logger_log *log,
>                if (copy_to_user(buf + len, log->buffer, count - len))
>                        return -EFAULT;
>
> -       reader->r_off = logger_offset(reader->r_off + count);
> +       reader->r_off = logger_offset(log, reader->r_off + count);
>
>        return count;
>  }
> @@ -225,7 +229,7 @@ static size_t get_next_entry(struct logger_log *log, size_t off, size_t len)
>
>        do {
>                size_t nr = get_entry_len(log, off);
> -               off = logger_offset(off + nr);
> +               off = logger_offset(log, off + nr);
>                count += nr;
>        } while (count < len);
>
> @@ -260,7 +264,7 @@ static inline int clock_interval(size_t a, size_t b, size_t c)
>  static void fix_up_readers(struct logger_log *log, size_t len)
>  {
>        size_t old = log->w_off;
> -       size_t new = logger_offset(old + len);
> +       size_t new = logger_offset(log, old + len);
>        struct logger_reader *reader;
>
>        if (clock_interval(old, new, log->head))
> @@ -286,7 +290,7 @@ static void do_write_log(struct logger_log *log, const void *buf, size_t count)
>        if (count != len)
>                memcpy(log->buffer, buf + len, count - len);
>
> -       log->w_off = logger_offset(log->w_off + count);
> +       log->w_off = logger_offset(log, log->w_off + count);
>
>  }
>
> @@ -311,7 +315,7 @@ static ssize_t do_write_log_from_user(struct logger_log *log,
>                if (copy_from_user(log->buffer, buf + len, count - len))
>                        return -EFAULT;
>
> -       log->w_off = logger_offset(log->w_off + count);
> +       log->w_off = logger_offset(log, log->w_off + count);
>
>        return count;
>  }
> --
> 1.7.2.3
>
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