From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Oreoluwa Babatunde <quic_obabatun@quicinc.com>,
ysato@users.sourceforge.jp, dalias@libc.org
Cc: akpm@linux-foundation.org, linux-sh@vger.kernel.org,
linux-kernel@vger.kernel.org, robh+dt@kernel.org,
kernel@quicinc.com, Rob Herring <robh@kernel.org>
Subject: Re: [PATCH v2] sh: Call paging_init() earlier in the init sequence
Date: Mon, 29 Apr 2024 11:03:15 +0200 [thread overview]
Message-ID: <6ba5b226dfcbae3d9c789bb6943089621b315d65.camel@physik.fu-berlin.de> (raw)
In-Reply-To: <20240423233150.74302-1-quic_obabatun@quicinc.com>
Hi Oreoluwa,
On Tue, 2024-04-23 at 16:31 -0700, Oreoluwa Babatunde wrote:
> The unflatten_device_tree() function contains a call to
> memblock_alloc(). This is a problem because this allocation is done
> before any of the reserved memory is set aside in paging_init().
> This means that there is a possibility for memblock to allocate from
> any of the memory regions that are supposed to be set aside as reserved.
>
> Hence, move the call to paging_init() to be earlier in the init
> sequence so that the reserved memory regions are set aside before any
> allocations are done using memblock.
>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Oreoluwa Babatunde <quic_obabatun@quicinc.com>
> ---
> v2:
> - Added Rob Herrings Reviewed-by.
> - cc Andrew Morton to assist with merging this for sh architecture.
> Similar change made for loongarch and openrisc in v1 have already
> been merged.
Could you link the changes for references so I can have a look?
> v1:
> https://lore.kernel.org/all/1707524971-146908-4-git-send-email-quic_obabatun@quicinc.com/
>
> arch/sh/kernel/setup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
> index 620e5cf8ae1e..98c8473e130d 100644
> --- a/arch/sh/kernel/setup.c
> +++ b/arch/sh/kernel/setup.c
> @@ -322,6 +322,8 @@ void __init setup_arch(char **cmdline_p)
> /* Let earlyprintk output early console messages */
> sh_early_platform_driver_probe("earlyprintk", 1, 1);
>
> + paging_init();
> +
> #ifdef CONFIG_OF_EARLY_FLATTREE
> #ifdef CONFIG_USE_BUILTIN_DTB
> unflatten_and_copy_device_tree();
> @@ -330,8 +332,6 @@ void __init setup_arch(char **cmdline_p)
> #endif
> #endif
>
> - paging_init();
> -
> /* Perform the machine specific initialisation */
> if (likely(sh_mv.mv_setup))
> sh_mv.mv_setup(cmdline_p);
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
next prev parent reply other threads:[~2024-04-29 9:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 23:31 [PATCH v2] sh: Call paging_init() earlier in the init sequence Oreoluwa Babatunde
2024-04-24 4:47 ` John Paul Adrian Glaubitz
2024-04-24 8:45 ` Markus Elfring
2024-04-24 10:24 ` John Paul Adrian Glaubitz
2024-04-24 11:06 ` [v2] " Markus Elfring
2024-04-29 9:03 ` John Paul Adrian Glaubitz [this message]
2024-04-29 16:28 ` [PATCH v2] " Oreoluwa Babatunde
2024-04-29 17:26 ` John Paul Adrian Glaubitz
2024-04-29 17:54 ` Oreoluwa Babatunde
2024-05-01 17:18 ` John Paul Adrian Glaubitz
2024-05-02 10:29 ` John Paul Adrian Glaubitz
2024-05-07 21:42 ` Oreoluwa Babatunde
2024-05-07 22:41 ` John Paul Adrian Glaubitz
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