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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/arch/arc/include/asm/highmem.h
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@@ -1,10 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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  */
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 #ifndef _ASM_HIGHMEM_H
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@@ -13,49 +9,45 @@
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 #ifdef CONFIG_HIGHMEM
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 #include <uapi/asm/page.h>
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-#include <asm/kmap_types.h>
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+#include <asm/kmap_size.h>
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+
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+#define FIXMAP_SIZE		PGDIR_SIZE
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+#define PKMAP_SIZE		PGDIR_SIZE
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 /* start after vmalloc area */
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 #define FIXMAP_BASE		(PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
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-#define FIXMAP_SIZE		PGDIR_SIZE	/* only 1 PGD worth */
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-#define KM_TYPE_NR		((FIXMAP_SIZE >> PAGE_SHIFT)/NR_CPUS)
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-#define FIXMAP_ADDR(nr)		(FIXMAP_BASE + ((nr) << PAGE_SHIFT))
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+
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+#define FIX_KMAP_SLOTS		(KM_MAX_IDX * NR_CPUS)
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+#define FIX_KMAP_BEGIN		(0UL)
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+#define FIX_KMAP_END		((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1)
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+
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+#define FIXADDR_TOP		(FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT))
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+
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+/*
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+ * This should be converted to the asm-generic version, but of course this
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+ * is needlessly different from all other architectures. Sigh - tglx
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+ */
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+#define __fix_to_virt(x)	(FIXADDR_TOP - ((x) << PAGE_SHIFT))
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+#define __virt_to_fix(x)	(((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT)
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 /* start after fixmap area */
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 #define PKMAP_BASE		(FIXMAP_BASE + FIXMAP_SIZE)
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-#define PKMAP_SIZE		PGDIR_SIZE
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 #define LAST_PKMAP		(PKMAP_SIZE >> PAGE_SHIFT)
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 #define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
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 #define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
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 #define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
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-#define kmap_prot		PAGE_KERNEL
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-
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-
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 #include <asm/cacheflush.h>
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-extern void *kmap(struct page *page);
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-extern void *kmap_high(struct page *page);
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-extern void *kmap_atomic(struct page *page);
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-extern void __kunmap_atomic(void *kvaddr);
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-extern void kunmap_high(struct page *page);
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-
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 extern void kmap_init(void);
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+
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+#define arch_kmap_local_post_unmap(vaddr)			\
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+	local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
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 static inline void flush_cache_kmaps(void)
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 {
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 	flush_cache_all();
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 }
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-
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-static inline void kunmap(struct page *page)
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-{
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-	BUG_ON(in_interrupt());
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-	if (!PageHighMem(page))
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-		return;
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-	kunmap_high(page);
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-}
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-
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-
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 #endif
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 #endif