On Wed, Oct 13, 2021 at 2:29 AM Matthew Wilcox (Oracle)
<willy@xxxxxxxxxxxxx> wrote:
>
> Instead of assigning ptf[i].value, leave the values in the on-stack
> array and then we can make the array const.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Yafang Shao <laoar.shao@xxxxxxxxx>
> ---
> lib/test_printf.c | 21 ++++++++-------------
> 1 file changed, 8 insertions(+), 13 deletions(-)
>
> diff --git a/lib/test_printf.c b/lib/test_printf.c
> index 55082432f37e..a52c1c3a55ba 100644
> --- a/lib/test_printf.c
> +++ b/lib/test_printf.c
> @@ -586,22 +586,21 @@ struct page_flags_test {
> int width;
> int shift;
> int mask;
> - unsigned long value;
> const char *fmt;
> const char *name;
> };
>
> -static struct page_flags_test pft[] = {
> +static const struct page_flags_test pft[] = {
> {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
> - 0, "%d", "section"},
> + "%d", "section"},
> {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
> - 0, "%d", "node"},
> + "%d", "node"},
> {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
> - 0, "%d", "zone"},
> + "%d", "zone"},
> {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
> - 0, "%#x", "lastcpupid"},
> + "%#x", "lastcpupid"},
> {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
> - 0, "%#x", "kasantag"},
> + "%#x", "kasantag"},
> };
>
> static void __init
> @@ -627,10 +626,6 @@ page_flags_test(int section, int node, int zone, int last_cpupid,
> #endif
> }
>
> - /* Set the test value */
> - for (i = 0; i < ARRAY_SIZE(pft); i++)
> - pft[i].value = values[i];
> -
> for (i = 0; i < ARRAY_SIZE(pft); i++) {
> if (!pft[i].width)
> continue;
> @@ -640,11 +635,11 @@ page_flags_test(int section, int node, int zone, int last_cpupid,
> size = strlen(cmp_buf);
> }
>
> - page_flags |= (pft[i].value & pft[i].mask) << pft[i].shift;
> + page_flags |= (values[i] & pft[i].mask) << pft[i].shift;
> snprintf(cmp_buf + size, BUF_SIZE - size, "%s=", pft[i].name);
> size = strlen(cmp_buf);
> snprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,
> - pft[i].value & pft[i].mask);
> + values[i] & pft[i].mask);
> size = strlen(cmp_buf);
> append = true;
> }
> --
> 2.32.0
>
--
Thanks
Yafang
