On Mon, Jan 25, 2021 at 04:34:17PM -0800, Dave Hansen wrote:

From: Dave Hansen <dave.hansen@linux.intel.com>

RECLAIM_ZONE was assumed to be unused because it was never explicitly
used in the kernel.  However, there were a number of places where it
was checked implicitly by checking 'node_reclaim_mode' for a zero
value.

These zero checks are not great because it is not obvious what a zero
mode *means* in the code.  Replace them with a helper which makes it
more obvious: node_reclaim_enabled().

This helper also provides a handy place to explicitly check the
RECLAIM_ZONE bit itself.  Check it explicitly there to make it more
obvious where the bit can affect behavior.

This should have no functional impact.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Ben Widawsky <redacted>
Acked-by: Christoph Lameter <redacted>
Cc: Alex Shi <redacted>
Cc: "Tobin C. Harding" <tobin@kernel.org>
Cc: Christoph Lameter <redacted>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Huang Ying <redacted>
Cc: Dan Williams <redacted>
Cc: Qian Cai <redacted>
Cc: Daniel Wagner <redacted>
Cc: osalvador <osalvador@suse.de>

Reviewed-by: Oscar Salvador <osalvador@suse.de>


-- 
Oscar Salvador
SUSE L3