linux-kernel - Re: [PATCH] kasan: fix coccinelle warnings in kasan_p*

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Date:   Tue, 5 Mar 2019 19:14:05 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Kostya Serebryany <kcc@...gle.com>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH] kasan: fix coccinelle warnings in kasan_p*_table



On 3/4/19 8:04 PM, Andrey Konovalov wrote:
> kasan_p4d_table, kasan_pmd_table and kasan_pud_table are declared as
> returning bool, but return 0 instead of false, which produces a coccinelle
> warning. Fix it.
> 
> Fixes: 0207df4fa1a8 ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN")
> Reported-by: kbuild test robot <lkp@...el.com>
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
> ---

Acked-by: Andrey Ryabinin <aryabinin@...tuozzo.com>


>  mm/kasan/init.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/kasan/init.c b/mm/kasan/init.c
> index 45a1b5e38e1e..fcaa1ca03175 100644
> --- a/mm/kasan/init.c
> +++ b/mm/kasan/init.c
> @@ -42,7 +42,7 @@ static inline bool kasan_p4d_table(pgd_t pgd)
>  #else
>  static inline bool kasan_p4d_table(pgd_t pgd)
>  {
> -	return 0;
> +	return false;
>  }
>  #endif
>  #if CONFIG_PGTABLE_LEVELS > 3
> @@ -54,7 +54,7 @@ static inline bool kasan_pud_table(p4d_t p4d)
>  #else
>  static inline bool kasan_pud_table(p4d_t p4d)
>  {
> -	return 0;
> +	return false;
>  }
>  #endif
>  #if CONFIG_PGTABLE_LEVELS > 2
> @@ -66,7 +66,7 @@ static inline bool kasan_pmd_table(pud_t pud)
>  #else
>  static inline bool kasan_pmd_table(pud_t pud)
>  {
> -	return 0;
> +	return false;
>  }
>  #endif
>  pte_t kasan_early_shadow_pte[PTRS_PER_PTE] __page_aligned_bss;
>