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Wed, 07 Oct 2026 10:41:45 -0700 (PDT) From: Magnus Lindholm To: davem@davemloft.net, andreas@gaisler.com Cc: sam@ravnborg.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linmag7@gmail.com Subject: [PATCH v5 4/6] sparc32: drop unused valid address bitmap Date: Wed, 7 Oct 2026 19:41:13 +0200 Message-ID: <20261007174128.959307-5-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261007174128.959307-1-linmag7@gmail.com> References: <20261007174128.959307-1-linmag7@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit sparc_valid_addr_bitmap is populated during early memory setup but never read. Remove the bitmap, its allocation and the population helper. Suggested-by: Sam Ravnborg Reviewed-by: Sam Ravnborg Signed-off-by: Magnus Lindholm --- arch/sparc/mm/init_32.c | 36 ------------------------------------ 1 file changed, 36 deletions(-) diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c index 75050dfbc2ea..6880d9cb30a5 100644 --- a/arch/sparc/mm/init_32.c +++ b/arch/sparc/mm/init_32.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include #include @@ -24,7 +23,6 @@ #include #include #include -#include #include #include @@ -37,8 +35,6 @@ #include "mm_32.h" -static unsigned long *sparc_valid_addr_bitmap; - unsigned long phys_base; EXPORT_SYMBOL(phys_base); @@ -218,27 +214,8 @@ void __init paging_init(void) device_scan(); } -static void __init taint_real_pages(void) -{ - int i; - - for (i = 0; sp_banks[i].num_bytes; i++) { - unsigned long start, end; - - start = sp_banks[i].base_addr; - end = start + sp_banks[i].num_bytes; - - while (start < end) { - set_bit(start >> 20, sparc_valid_addr_bitmap); - start += PAGE_SIZE; - } - } -} - void __init arch_mm_preinit(void) { - int i; - if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) { prom_printf("BUG: fixmap and pkmap areas overlap\n"); prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n", @@ -248,19 +225,6 @@ void __init arch_mm_preinit(void) prom_printf("Please mail sparclinux@vger.kernel.org.\n"); prom_halt(); } - - i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5); - i += 1; - sparc_valid_addr_bitmap = (unsigned long *) - memblock_alloc(i << 2, SMP_CACHE_BYTES); - - if (sparc_valid_addr_bitmap == NULL) { - prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); - prom_halt(); - } - memset(sparc_valid_addr_bitmap, 0, i << 2); - - taint_real_pages(); } void sparc_flush_page_to_ram(struct page *page) -- 2.43.0