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From: =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>
To: Nam Cao <namcao@linutronix.de>, Mike Rapoport <rppt@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>, Andreas Dilger
 <adilger@dilger.ca>, Al Viro <viro@zeniv.linux.org.uk>, linux-fsdevel
 <linux-fsdevel@vger.kernel.org>, Jan Kara <jack@suse.cz>, Linux Kernel
 Mailing List <linux-kernel@vger.kernel.org>,
 linux-riscv@lists.infradead.org, Theodore
 Ts'o <tytso@mit.edu>, Ext4 Developers List <linux-ext4@vger.kernel.org>,
 Conor Dooley <conor@kernel.org>, "Matthew Wilcox (Oracle)"
 <willy@infradead.org>, Anders Roxell <anders.roxell@linaro.org>, Alexandre
 Ghiti <alex@ghiti.fr>
Subject: Re: riscv32 EXT4 splat, 6.8 regression?
In-Reply-To: <20240416173030.257f0807@namcao>
References: <20240416-deppen-gasleitung-8098fcfd6bbd@brauner>
 <8734rlo9j7.fsf@all.your.base.are.belong.to.us>
 <Zh6KNglOu8mpTPHE@kernel.org> <20240416171713.7d76fe7d@namcao>
 <20240416173030.257f0807@namcao>
Date: Tue, 16 Apr 2024 17:56:25 +0200
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Nam Cao <namcao@linutronix.de> writes:

> Fixed version:
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index fa34cf55037b..af4192bc51d0 100644
> --- a/arch/riscv/mm/init.c
> +++ b/arch/riscv/mm/init.c
> @@ -245,6 +245,7 @@ static void __init setup_bootmem(void)
>  	 * be done as soon as the kernel mapping base address is determined.
>  	 */
>  	if (!IS_ENABLED(CONFIG_64BIT)) {
> +		memblock_reserve(__pa(-PAGE_SIZE), PAGE_SIZE);
>  		max_mapped_addr =3D __pa(~(ulong)0);
>  		if (max_mapped_addr =3D=3D (phys_ram_end - 1))
>  			memblock_set_current_limit(max_mapped_addr - 4096);

Nice!

Can't we get rid of the if-statement, and max_mapped_address as well?


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