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[2003:d8:2f31:700:3851:c66a:b6b9:3490]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3a568a547ecsm14548596f8f.17.2025.06.17.08.43.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Jun 2025 08:43:51 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, nvdimm@lists.linux.dev, David Hildenbrand , Andrew Morton , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Dan Williams , Alistair Popple , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , Zi Yan , Baolin Wang , Lorenzo Stoakes , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato Subject: [PATCH RFC 02/14] mm: drop highest_memmap_pfn Date: Tue, 17 Jun 2025 17:43:33 +0200 Message-ID: <20250617154345.2494405-3-david@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250617154345.2494405-1-david@redhat.com> References: <20250617154345.2494405-1-david@redhat.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 9vaTr4sWg8TSJomicRFfKXC_-mJCO7Djcd2qYFSJvZ4_1750175032 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Now unused, so let's drop it. Signed-off-by: David Hildenbrand --- mm/internal.h | 2 -- mm/memory.c | 2 -- mm/mm_init.c | 3 --- mm/nommu.c | 1 - 4 files changed, 8 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index f519eb7217c26..703871905fd6d 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -503,8 +503,6 @@ static inline bool folio_needs_release(struct folio *folio) (mapping && mapping_release_always(mapping)); } -extern unsigned long highest_memmap_pfn; - /* * Maximum number of reclaim retries without progress before the OOM * killer is consider the only way forward. diff --git a/mm/memory.c b/mm/memory.c index 188b84ebf479a..a1b5575db52ac 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -146,8 +146,6 @@ __setup("norandmaps", disable_randmaps); unsigned long zero_pfn __read_mostly; EXPORT_SYMBOL(zero_pfn); -unsigned long highest_memmap_pfn __read_mostly; - /* * CONFIG_MMU architectures set up ZERO_PAGE in their paging_init() */ diff --git a/mm/mm_init.c b/mm/mm_init.c index 5c21b3af216b2..1dac66c209984 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -881,9 +881,6 @@ void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone unsigned long pfn, end_pfn = start_pfn + size; struct page *page; - if (highest_memmap_pfn < end_pfn - 1) - highest_memmap_pfn = end_pfn - 1; - #ifdef CONFIG_ZONE_DEVICE /* * Honor reservation requested by the driver for this ZONE_DEVICE diff --git a/mm/nommu.c b/mm/nommu.c index 38c22ea0a95c6..cd9ddbfe1af80 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -42,7 +42,6 @@ #include #include "internal.h" -unsigned long highest_memmap_pfn; int heap_stack_gap = 0; atomic_long_t mmap_pages_allocated; -- 2.49.0