On Tue, Apr 14, 2015 at 04:56:23PM -0400, Sasha Levin wrote:
> Format various flags to a string buffer rather than printing them. This is
> a helper for later.
>
> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
> ---
> mm/debug.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/mm/debug.c b/mm/debug.c
> index 3eb3ac2..c9f7dd7 100644
> --- a/mm/debug.c
> +++ b/mm/debug.c
> @@ -80,6 +80,41 @@ static void dump_flags(unsigned long flags,
> pr_cont(")\n");
> }
>
> +static char *format_flags(unsigned long flags,
> + const struct trace_print_flags *names, int count,
> + char *buf, char *end)
> +{
> + const char *delim = "";
> + unsigned long mask;
> + int i;
> +
> + buf += snprintf(buf, (buf > end ? 0 : end - buf),
> + "flags: %#lx(", flags);
> +
> + /* remove zone id */
> + flags &= (1UL << NR_PAGEFLAGS) - 1;
> +
> + for (i = 0; i < count && flags; i++) {
> + mask = names[i].mask;
> + if ((flags & mask) != mask)
> + continue;
> +
> + flags &= ~mask;
> + buf += snprintf(buf, (buf > end ? 0 : end - buf),
> + "%s%s", delim, names[i].name);
Indent is off. Otherwise look okay to me.
> + delim = "|";
> + }
> +
> + /* check for left over flags */
> + if (flags)
> + buf += snprintf(buf, (buf > end ? 0 : end - buf),
> + "%s%#lx", delim, flags);
> +
> + buf += snprintf(buf, (buf > end ? 0 : end - buf), ")\n");
> +
> + return buf;
> +}
> +
> void dump_page_badflags(struct page *page, const char *reason,
> unsigned long badflags)
> {
> --
> 1.7.10.4
>
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--
Kirill A. Shutemov
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