+ mm-damon-paddr-support-the-pageout-scheme-fix.patch added to -mm tree

+ mm-damon-paddr-support-the-pageout-scheme-fix.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/damon: fix missing-prototype build warning for 'damon_pa_apply_scheme()'
has been added to the -mm tree.  Its filename is
     mm-damon-paddr-support-the-pageout-scheme-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-damon-paddr-support-the-pageout-scheme-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-damon-paddr-support-the-pageout-scheme-fix.patch

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon: fix missing-prototype build warning for 'damon_pa_apply_scheme()'

Kernel test robot found[1] commit ccd554f15bb1 ("mm/damon/paddr: support
the pageout scheme") on the -mm tree[2], which is introduced by the patch
titled 'mm-damon-paddr-support-the-pageout-scheme.patch'[3] introduces
following build warning, and therefore the build fails if
'CONFIG_WERROR=y'.

    linux/mm/damon/paddr.c:216:5: error: no previous prototype for `damon_pa_apply_scheme' [-Werror=missing-prototypes]
     int damon_pa_apply_scheme(struct damon_ctx *ctx, struct damon_target *t,
         ^~~~~~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors
    linux/scripts/Makefile.build:277: recipe for target 'mm/damon/paddr.o' failed

This commit fixes the warning by adding the missed prototype in the
header file.

Note: Because the reported '.config' introduces warnings on not only DAMON
but also other subsystems, I tested for only DAMON by adding the below
compiler flag in mm/damon/Makefile.

    ccflags-$(CONFIG_DAMON_PADDR)  += -Werror -Wmissing-prototypes

[1] https://lore.kernel.org/lkml/202110250029.5rftt73s-lkp@intel.com/
[2] https://github.com/hnaz/linux-mm/commit/ccd554f15bb1cd977d740c1ea8241ecf95108c94
[3] https://lore.kernel.org/mm-commits/20211019213137.91_rr1GrX%25akpm@linux-foundation.org/

Link: https://lkml.kernel.org/r/20211025064220.13904-1-sj@kernel.org
Fixes: ccd554f15bb1 ("mm/damon/paddr: support the pageout scheme") in -mm tree
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/damon.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/linux/damon.h~mm-damon-paddr-support-the-pageout-scheme-fix
+++ a/include/linux/damon.h
@@ -357,6 +357,8 @@ void damon_va_set_primitives(struct damo
 void damon_pa_prepare_access_checks(struct damon_ctx *ctx);
 unsigned int damon_pa_check_accesses(struct damon_ctx *ctx);
 bool damon_pa_target_valid(void *t);
+int damon_pa_apply_scheme(struct damon_ctx *context, struct damon_target *t,
+		struct damon_region *r, struct damos *scheme);
 void damon_pa_set_primitives(struct damon_ctx *ctx);
 
 #endif	/* CONFIG_DAMON_PADDR */
_

Patches currently in -mm which might be from sj@kernel.org are

maintainers-update-seongjaes-email-address.patch
mm-damon-core-print-kdamond-start-log-in-debug-mode-only.patch
mm-damon-core-account-age-of-target-regions.patch
mm-damon-core-implement-damon-based-operation-schemes-damos.patch
mm-damon-vaddr-support-damon-based-operation-schemes.patch
mm-damon-dbgfs-support-damon-based-operation-schemes.patch
mm-damon-schemes-implement-statistics-feature.patch
selftests-damon-add-schemes-debugfs-tests.patch
docs-admin-guide-mm-damon-document-damon-based-operation-schemes.patch
mm-damon-dbgfs-allow-users-to-set-initial-monitoring-target-regions.patch
mm-damon-dbgfs-test-add-a-unit-test-case-for-init_regions.patch
docs-admin-guide-mm-damon-document-init_regions-feature.patch
mm-damon-vaddr-separate-commonly-usable-functions.patch
mm-damon-vaddr-separate-commonly-usable-functions-fix.patch
mm-damon-implement-primitives-for-physical-address-space-monitoring.patch
mm-damon-dbgfs-support-physical-memory-monitoring.patch
docs-damon-document-physical-memory-monitoring-support.patch
mm-damon-paddr-support-the-pageout-scheme.patch
mm-damon-paddr-support-the-pageout-scheme-fix.patch
mm-damon-schemes-implement-size-quota-for-schemes-application-speed-control.patch
mm-damon-schemes-skip-already-charged-targets-and-regions.patch
mm-damon-schemes-implement-time-quota.patch
mm-damon-dbgfs-support-quotas-of-schemes.patch
mm-damon-selftests-support-schemes-quotas.patch
mm-damon-schemes-prioritize-regions-within-the-quotas.patch
mm-damon-vaddrpaddr-support-pageout-prioritization.patch
mm-damon-dbgfs-support-prioritization-weights.patch
tools-selftests-damon-update-for-regions-prioritization-of-schemes.patch
mm-damon-schemes-activate-schemes-based-on-a-watermarks-mechanism.patch
mm-damon-dbgfs-support-watermarks.patch
selftests-damon-support-watermarks.patch
mm-damon-introduce-damon-based-reclamation-damon_reclaim.patch
documentation-admin-guide-mm-damon-add-a-document-for-damon_reclaim.patch
docs-admin-guide-mm-damon-start-fix-wrong-example-commands.patch
docs-admin-guide-mm-damon-start-fix-a-wrong-link.patch
docs-admin-guide-mm-damon-start-simplify-the-content.patch
docs-admin-guide-mm-pagemap-wordsmith-page-flags-descriptions.patch