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kasan, page_alloc: move kernel_init_free_pages in post_alloc_hook

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Pull the kernel_init_free_pages() call in post_alloc_hook() out of the big
if clause for better code readability.  This also allows for more
simplifications in the following patch.

This patch does no functional changes.

Link: https://lkml.kernel.org/r/a7a76456501eb37ddf9fca6529cee9555e59cdb1.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Konovalov 2022-03-24 18:10:40 -07:00 committed by Linus Torvalds
parent 89b2711633
commit 7e3cbba65d
1 changed files with 8 additions and 4 deletions
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12
mm/page_alloc.c
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@ -2383,14 +2383,18 @@ inline void post_alloc_hook(struct page *page, unsigned int order,
init = false;
}
if (kasan_has_integrated_init()) {
if (!init_tags)
if (!init_tags) {
kasan_unpoison_pages(page, order, init);
/* Note that memory is already initialized by KASAN. */
init = false;
}
} else {
kasan_unpoison_pages(page, order, init);
if (init)
kernel_init_free_pages(page, 1 << order);
}
/* If memory is still not initialized, do it now. */
if (init)
kernel_init_free_pages(page, 1 << order);
/* Propagate __GFP_SKIP_KASAN_POISON to page flags. */
if (kasan_hw_tags_enabled() && (gfp_flags & __GFP_SKIP_KASAN_POISON))
SetPageSkipKASanPoison(page);