mm/damon/paddr: remove damon_pa_access_chk_result struct

'damon_pa_access_chk_result' struct contains only one field.  Use a
variable instead.

Link: https://lkml.kernel.org/r/20230109213335.62525-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index b51606519bbd568e13062145d23fb133a75ae26d..b4df9b9bcc0a1b871eff60a2eec4d8fefcefafdd 100644 (file)
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -79,50 +79,44 @@ static void damon_pa_prepare_access_checks(struct damon_ctx *ctx)
        }
 }
 
-struct damon_pa_access_chk_result {
-       bool accessed;
-};
-
 static bool __damon_pa_young(struct folio *folio, struct vm_area_struct *vma,
                unsigned long addr, void *arg)
 {
-       struct damon_pa_access_chk_result *result = arg;
+       bool *accessed = arg;
        DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, addr, 0);
 
-       result->accessed = false;
+       *accessed = false;
        while (page_vma_mapped_walk(&pvmw)) {
                addr = pvmw.address;
                if (pvmw.pte) {
-                       result->accessed = pte_young(*pvmw.pte) ||
+                       *accessed = pte_young(*pvmw.pte) ||
                                !folio_test_idle(folio) ||
                                mmu_notifier_test_young(vma->vm_mm, addr);
                } else {
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-                       result->accessed = pmd_young(*pvmw.pmd) ||
+                       *accessed = pmd_young(*pvmw.pmd) ||
                                !folio_test_idle(folio) ||
                                mmu_notifier_test_young(vma->vm_mm, addr);
 #else
                        WARN_ON_ONCE(1);
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
                }
-               if (result->accessed) {
+               if (*accessed) {
                        page_vma_mapped_walk_done(&pvmw);
                        break;
                }
        }
 
        /* If accessed, stop walking */
-       return !result->accessed;
+       return *accessed == false;
 }
 
 static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
 {
        struct folio *folio = damon_get_folio(PHYS_PFN(paddr));
-       struct damon_pa_access_chk_result result = {
-               .accessed = false,
-       };
+       bool accessed = false;
        struct rmap_walk_control rwc = {
-               .arg = &result,
+               .arg = &accessed,
                .rmap_one = __damon_pa_young,
                .anon_lock = folio_lock_anon_vma_read,
        };
@@ -133,9 +127,9 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
 
        if (!folio_mapped(folio) || !folio_raw_mapping(folio)) {
                if (folio_test_idle(folio))
-                       result.accessed = false;
+                       accessed = false;
                else
-                       result.accessed = true;
+                       accessed = true;
                folio_put(folio);
                goto out;
        }
@@ -154,7 +148,7 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
 
 out:
        *folio_sz = folio_size(folio);
-       return result.accessed;
+       return accessed;
 }
 
 static void __damon_pa_check_access(struct damon_region *r)