linux-kernel - Re: [PATCH 05/13] MIPS: make setup_zero

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Message-ID: <Z8_Qw9Soe5bzWJ44@kernel.org>
Date: Tue, 11 Mar 2025 07:57:23 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Gordeev <agordeev@...ux.ibm.com>,
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Subject: Re: [PATCH 05/13] MIPS: make setup_zero_pages() use memblock

On Thu, Mar 06, 2025 at 08:51:15PM +0200, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@...nel.org>
> 
> Allocating the zero pages from memblock is simpler because the memory is
> already reserved.
> 
> This will also help with pulling out memblock_free_all() to the generic
> code and reducing code duplication in arch::mem_init().
> 
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
> ---
>  arch/mips/include/asm/mmzone.h |  2 --
>  arch/mips/mm/init.c            | 16 +++++-----------
>  2 files changed, 5 insertions(+), 13 deletions(-)
 
Andrew can you please pick this as a fixup?

>From 148713d17cbdf7a3ad08f18ba203185b70c0e7c2 Mon Sep 17 00:00:00 2001
From: "Mike Rapoport (Microsoft)" <rppt@...nel.org>
Date: Tue, 11 Mar 2025 07:51:27 +0200
Subject: [PATCH] MIPS: use memblock_alloc_or_panic() in setup_zero_page()

Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
---
 arch/mips/mm/init.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 6ea27bbd387e..a673d3d68254 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -68,9 +68,7 @@ static void __init setup_zero_pages(void)
 	else
 		order = 0;
 
-	empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE << order, PAGE_SIZE);
-	if (!empty_zero_page)
-		panic("Oh boy, that early out of memory?");
+	empty_zero_page = (unsigned long)memblock_alloc_or_panic(PAGE_SIZE << order, PAGE_SIZE);
 
 	zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK;
 }
-- 
2.47.2

-- 
Sincerely yours,
Mike.