From 1f73dfdeb9c2ae04daa82adf68c22f9d32989210 Mon Sep 17 00:00:00 2001
From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
Date: Thu, 3 Sep 2026 12:28:29 +0300
Subject: [PATCH] mm/vmalloc: constify vm parameter of get_vm_area_page_order()

get_vm_area_page_order() and vm_area_page_order() do not need to modify
struct vm_struct passed to them.

Constify the parameter.

Link: https://lore.kernel.org/20260903-execmem-set-vm-perms-v0-2-v3-3-949b64a9f755@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Will Deacon <will@kernel.org>
---
 mm/vmalloc.c | 4 ++--
 mm/vmalloc.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9bd94e2f2895..a3e2e4244c0f 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3124,7 +3124,7 @@ EXPORT_SYMBOL(vm_map_ram);
 
 static struct vm_struct *vmlist __initdata;
 
-static inline unsigned int vm_area_page_order(struct vm_struct *vm)
+static inline unsigned int vm_area_page_order(const struct vm_struct *vm)
 {
 #ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
 	return vm->page_order;
@@ -3133,7 +3133,7 @@ static inline unsigned int vm_area_page_order(struct vm_struct *vm)
 #endif
 }
 
-unsigned int get_vm_area_page_order(struct vm_struct *vm)
+unsigned int get_vm_area_page_order(const struct vm_struct *vm)
 {
 	return vm_area_page_order(vm);
 }
diff --git a/mm/vmalloc.h b/mm/vmalloc.h
index 8866ddcff668..211869f36509 100644
--- a/mm/vmalloc.h
+++ b/mm/vmalloc.h
@@ -12,7 +12,7 @@ void __init vmalloc_init(void);
 int __must_check vmap_pages_range_noflush(unsigned long addr, unsigned long end,
 		pgprot_t prot, struct page **pages,
 		unsigned int page_shift, gfp_t gfp_mask);
-unsigned int get_vm_area_page_order(struct vm_struct *vm);
+unsigned int get_vm_area_page_order(const struct vm_struct *vm);
 #else
 static inline void vmalloc_init(void) {}