linux-kernel - [PATCH v2] x86/setup: Use a more concise memblock API

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Message-ID: <20231114073700.126543-1-ytcoode@gmail.com>
Date:   Tue, 14 Nov 2023 15:37:00 +0800
From:   Yuntao Wang <ytcoode@...il.com>
To:     bhe@...hat.com
Cc:     alexander.shishkin@...ux.intel.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, jgross@...e.com,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        peterz@...radead.org, ssengar@...ux.microsoft.com,
        tglx@...utronix.de, x86@...nel.org, ytcoode@...il.com,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2] x86/setup: Use a more concise memblock API

When executing relocate_initrd()/numa_emulation()/numa_alloc_distance(),
the memblock.current_limit field has already been set to
`max_pfn_mapped << PAGE_SHIFT`, therefore we can replace
memblock_phys_alloc_range() with memblock_phys_alloc(), which has the same
functionality but is more concise.

Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
v1 -> v2:

Also replace memblock_phys_alloc_range() in numa_emulation() and
numa_alloc_distance() with memblock_phys_alloc()

 arch/x86/kernel/setup.c      | 3 +--
 arch/x86/mm/numa.c           | 3 +--
 arch/x86/mm/numa_emulation.c | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ec2c21a1844e..422497c17eec 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -259,8 +259,7 @@ static void __init relocate_initrd(void)
 	u64 area_size     = PAGE_ALIGN(ramdisk_size);

 	/* We need to move the initrd down into directly mapped mem */
-	u64 relocated_ramdisk = memblock_phys_alloc_range(area_size, PAGE_SIZE, 0,
-						      PFN_PHYS(max_pfn_mapped));
+	u64 relocated_ramdisk = memblock_phys_alloc(area_size, PAGE_SIZE);
 	if (!relocated_ramdisk)
 		panic("Cannot find place for new RAMDISK of size %lld\n",
 		      ramdisk_size);
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index b29ceb19e46e..29cd8fc8ede1 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -378,8 +378,7 @@ static int __init numa_alloc_distance(void)
 	cnt++;
 	size = cnt * cnt * sizeof(numa_distance[0]);

-	phys = memblock_phys_alloc_range(size, PAGE_SIZE, 0,
-					 PFN_PHYS(max_pfn_mapped));
+	phys = memblock_phys_alloc(size, PAGE_SIZE);
 	if (!phys) {
 		pr_warn("Warning: can't allocate distance table!\n");
 		/* don't retry until explicitly reset */
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index 9a9305367fdd..8acb8d0f7d0f 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -447,8 +447,7 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	if (numa_dist_cnt) {
 		u64 phys;

-		phys = memblock_phys_alloc_range(phys_size, PAGE_SIZE, 0,
-						 PFN_PHYS(max_pfn_mapped));
+		phys = memblock_phys_alloc(phys_size, PAGE_SIZE);
 		if (!phys) {
 			pr_warn("NUMA: Warning: can't allocate copy of distance table, disabling emulation\n");
 			goto no_emu;
--
2.42.1