mm/hugetlb: drop hugetlb_cma_check()

hugetlb_cma_check() was required when the ordering of
hugetlb_cma_reserve() and hugetlb_bootmem_alloc() was architecture
depended.

Since hugetlb_cma_reserve() is always called before
hugetlb_bootmem_alloc() there is no need to check whether
hugetlb_cma_reserve() was already called.

Drop unneeded hugetlb_cma_check() function.

Link: https://lkml.kernel.org/r/20260111082105.290734-29-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Klara Modin <klarasmodin@gmail.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Magnus Lindholm <linmag7@gmail.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

3 files changed, 3 insertions, 19 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a1832da0f623..fe4b9f2ebdb6 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4159,7 +4159,6 @@ static int __init hugetlb_init(void)
 		}
 	}
 
-	hugetlb_cma_check();
 	hugetlb_init_hstates();
 	gather_bootmem_prealloc();
 	report_hugepages();
diff --git a/mm/hugetlb_cma.c b/mm/hugetlb_cma.c
index b1eb5998282c..f5e79103e110 100644
--- a/mm/hugetlb_cma.c
+++ b/mm/hugetlb_cma.c
@@ -85,9 +85,6 @@ hugetlb_cma_alloc_bootmem(struct hstate *h, int *nid, bool node_exact)
 	return m;
 }
 
-
-static bool cma_reserve_called __initdata;
-
 static int __init cmdline_parse_hugetlb_cma(char *p)
 {
 	int nid, count = 0;
@@ -149,8 +146,10 @@ void __init hugetlb_cma_reserve(void)
 		return;
 
 	order = arch_hugetlb_cma_order();
-	if (!order)
+	if (!order) {
+		pr_warn("hugetlb_cma: the option isn't supported by current arch\n");
 		return;
+	}
 
 	/*
 	 * HugeTLB CMA reservation is required for gigantic
@@ -159,7 +158,6 @@ void __init hugetlb_cma_reserve(void)
 	 * breaking this assumption.
 	 */
 	VM_WARN_ON(order <= MAX_PAGE_ORDER);
-	cma_reserve_called = true;
 
 	hugetlb_bootmem_set_nodes();
 
@@ -253,14 +251,6 @@ void __init hugetlb_cma_reserve(void)
 		hugetlb_cma_size = 0;
 }
 
-void __init hugetlb_cma_check(void)
-{
-	if (!hugetlb_cma_size || cma_reserve_called)
-		return;
-
-	pr_warn("hugetlb_cma: the option isn't supported by current arch\n");
-}
-
 bool hugetlb_cma_exclusive_alloc(void)
 {
 	return hugetlb_cma_only;
diff --git a/mm/hugetlb_cma.h b/mm/hugetlb_cma.h
index 2c2ec8a7e134..78186839df3a 100644
--- a/mm/hugetlb_cma.h
+++ b/mm/hugetlb_cma.h
@@ -8,7 +8,6 @@ struct folio *hugetlb_cma_alloc_folio(int order, gfp_t gfp_mask,
 				      int nid, nodemask_t *nodemask);
 struct huge_bootmem_page *hugetlb_cma_alloc_bootmem(struct hstate *h, int *nid,
 						    bool node_exact);
-void hugetlb_cma_check(void);
 bool hugetlb_cma_exclusive_alloc(void);
 unsigned long hugetlb_cma_total_size(void);
 void hugetlb_cma_validate_params(void);
@@ -31,10 +30,6 @@ struct huge_bootmem_page *hugetlb_cma_alloc_bootmem(struct hstate *h, int *nid,
 	return NULL;
 }
 
-static inline void hugetlb_cma_check(void)
-{
-}
-
 static inline bool hugetlb_cma_exclusive_alloc(void)
 {
 	return false;