From: Randy Dunlap <rdunlap@infradead.org>
To: Baoquan He <bhe@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
akpm@linux-foundation.org, ignat@cloudflare.com,
linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, kexec@lists.infradead.org,
eric_devolder@yahoo.com
Subject: Re: [PATCH 1/2] riscv, crash: don't export some symbols when CONFIG_MMU=n
Date: Tue, 5 Dec 2023 09:08:37 -0800 [thread overview]
Message-ID: <5f9f018a-dc4f-42f0-ba90-2f44d2f61a7c@infradead.org> (raw)
In-Reply-To: <ZW7OsX4zQRA3mO4+@MiWiFi-R3L-srv>
On 12/4/23 23:18, Baoquan He wrote:
> On 12/04/23 at 11:14am, Randy Dunlap wrote:
[]
>>
>> Both riscv 32-bit and 64-bit complain:
>>
>> ../arch/riscv/kernel/crash_core.c: In function 'arch_crash_save_vmcoreinfo':
>> ../arch/riscv/kernel/crash_core.c:11:58: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'int' [-Wformat=]
>> 11 | vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START);
>> | ~~^
>> | |
>> | long unsigned int
>> | %x
>
> Thanks for all these testing.
>
> This warning is irrelevant to the kexec patch, it's becasue
> VMALLOC_START is defined as 0 which is int when CONFIG_MMU=n.
>
> Below patch can fix the warning.
>
> From 46984a0287e5f1b41ae3e9adfcfa0d26b71db8f4 Mon Sep 17 00:00:00 2001
> From: Baoquan He <bhe@redhat.com>
> Date: Tue, 5 Dec 2023 11:02:55 +0800
> Subject: [PATCH] riscv: fix VMALLC_START definition
> Content-type: text/plain
>
> When below config items are set, compiler complained:
>
> --------------------
> CONFIG_CRASH_CORE=y
> CONFIG_KEXEC_CORE=y
> CONFIG_CRASH_DUMP=y
> ......
> -----------------------
>
> -------------------------------------------------------------------
> arch/riscv/kernel/crash_core.c: In function 'arch_crash_save_vmcoreinfo':
> arch/riscv/kernel/crash_core.c:11:58: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'int' [-Wformat=]
> 11 | vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START);
> | ~~^
> | |
> | long unsigned int
> | %x
> ----------------------------------------------------------------------
>
> This is because on riscv macro VMALLOC_START has different type when
> CONFIG_MMU is set or unset.
>
> arch/riscv/include/asm/pgtable.h:
> --------------------------------------------------
>
> Changing it to _AC(0, UL) in case CONFIG_MMU=n can fix the warning.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Thanks.
> ---
> arch/riscv/include/asm/pgtable.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
> index 294044429e8e..ab00235b018f 100644
> --- a/arch/riscv/include/asm/pgtable.h
> +++ b/arch/riscv/include/asm/pgtable.h
> @@ -899,7 +899,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte)
> #define PAGE_KERNEL __pgprot(0)
> #define swapper_pg_dir NULL
> #define TASK_SIZE 0xffffffffUL
> -#define VMALLOC_START 0
> +#define VMALLOC_START _AC(0, UL)
> #define VMALLOC_END TASK_SIZE
>
> #endif /* !CONFIG_MMU */
--
~Randy
next prev parent reply other threads:[~2023-12-05 17:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-04 2:10 Re: linux-next: Tree for Dec 1 (riscv, crash_core) Baoquan He
2023-12-04 2:19 ` [PATCH 1/2] riscv, crash: don't export some symbols when CONFIG_MMU=n Baoquan He
2023-12-04 19:14 ` Randy Dunlap
2023-12-05 7:18 ` Baoquan He
2023-12-05 17:08 ` Randy Dunlap [this message]
2024-01-20 21:09 ` patchwork-bot+linux-riscv
2023-12-04 2:23 ` [PATCH 2/2] riscv, kexec: fix dependency of two items Baoquan He
2023-12-04 19:14 ` Randy Dunlap
2023-12-04 19:11 ` linux-next: Tree for Dec 1 (riscv, crash_core) Randy Dunlap
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