mm: kasan: Skip page unpoisoning only if __GFP_SKIP_KASAN_UNPOISON

[sfrench/cifs-2.6.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f6ed240870bc2142ff8fad0153a43834eff2e215..bf45a6aa407a62b0fc908daa1883a660feeec66f 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2361,7 +2361,7 @@ static inline bool check_new_pcp(struct page *page, unsigned int order)
 }
 #endif /* CONFIG_DEBUG_VM */
 
-static inline bool should_skip_kasan_unpoison(gfp_t flags, bool init_tags)
+static inline bool should_skip_kasan_unpoison(gfp_t flags)
 {
        /* Don't skip if a software KASAN mode is enabled. */
        if (IS_ENABLED(CONFIG_KASAN_GENERIC) ||
@@ -2373,12 +2373,10 @@ static inline bool should_skip_kasan_unpoison(gfp_t flags, bool init_tags)
                return true;
 
        /*
-        * With hardware tag-based KASAN enabled, skip if either:
-        *
-        * 1. Memory tags have already been cleared via tag_clear_highpage().
-        * 2. Skipping has been requested via __GFP_SKIP_KASAN_UNPOISON.
+        * With hardware tag-based KASAN enabled, skip if this has been
+        * requested via __GFP_SKIP_KASAN_UNPOISON.
         */
-       return init_tags || (flags & __GFP_SKIP_KASAN_UNPOISON);
+       return flags & __GFP_SKIP_KASAN_UNPOISON;
 }
 
 static inline bool should_skip_init(gfp_t flags)
@@ -2430,7 +2428,7 @@ inline void post_alloc_hook(struct page *page, unsigned int order,
                /* Note that memory is already initialized by the loop above. */
                init = false;
        }
-       if (!should_skip_kasan_unpoison(gfp_flags, init_tags)) {
+       if (!should_skip_kasan_unpoison(gfp_flags)) {
                /* Unpoison shadow memory or set memory tags. */
                kasan_unpoison_pages(page, order, init);