add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/xfs/kmem.h
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@@ -1,4 +1,4 @@
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-// SPDX-License-Identifier: GPL-2.0
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+/* SPDX-License-Identifier: GPL-2.0 */
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 /*
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  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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  * All Rights Reserved.
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@@ -16,11 +16,10 @@
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  */
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 typedef unsigned __bitwise xfs_km_flags_t;
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-#define KM_SLEEP	((__force xfs_km_flags_t)0x0001u)
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-#define KM_NOSLEEP	((__force xfs_km_flags_t)0x0002u)
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 #define KM_NOFS		((__force xfs_km_flags_t)0x0004u)
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 #define KM_MAYFAIL	((__force xfs_km_flags_t)0x0008u)
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 #define KM_ZERO		((__force xfs_km_flags_t)0x0010u)
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+#define KM_NOLOCKDEP	((__force xfs_km_flags_t)0x0020u)
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 /*
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  * We use a special process flag to avoid recursive callbacks into
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@@ -32,15 +31,11 @@
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 {
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 	gfp_t	lflags;
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-	BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
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+	BUG_ON(flags & ~(KM_NOFS | KM_MAYFAIL | KM_ZERO | KM_NOLOCKDEP));
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-	if (flags & KM_NOSLEEP) {
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-		lflags = GFP_ATOMIC | __GFP_NOWARN;
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-	} else {
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-		lflags = GFP_KERNEL | __GFP_NOWARN;
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-		if (flags & KM_NOFS)
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-			lflags &= ~__GFP_FS;
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-	}
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+	lflags = GFP_KERNEL | __GFP_NOWARN;
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+	if (flags & KM_NOFS)
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+		lflags &= ~__GFP_FS;
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 	/*
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 	 * Default page/slab allocator behavior is to retry for ever
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@@ -55,12 +50,15 @@
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 	if (flags & KM_ZERO)
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 		lflags |= __GFP_ZERO;
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+	if (flags & KM_NOLOCKDEP)
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+		lflags |= __GFP_NOLOCKDEP;
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+
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 	return lflags;
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 }
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 extern void *kmem_alloc(size_t, xfs_km_flags_t);
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+extern void *kmem_alloc_io(size_t size, int align_mask, xfs_km_flags_t flags);
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 extern void *kmem_alloc_large(size_t size, xfs_km_flags_t);
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-extern void *kmem_realloc(const void *, size_t, xfs_km_flags_t);
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 static inline void  kmem_free(const void *ptr)
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 {
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 	kvfree(ptr);
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@@ -73,55 +71,19 @@
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 	return kmem_alloc(size, flags | KM_ZERO);
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 }
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-static inline void *
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-kmem_zalloc_large(size_t size, xfs_km_flags_t flags)
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-{
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-	return kmem_alloc_large(size, flags | KM_ZERO);
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-}
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-
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 /*
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  * Zone interfaces
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  */
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-#define KM_ZONE_HWALIGN	SLAB_HWCACHE_ALIGN
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-#define KM_ZONE_RECLAIM	SLAB_RECLAIM_ACCOUNT
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-#define KM_ZONE_SPREAD	SLAB_MEM_SPREAD
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-#define KM_ZONE_ACCOUNT	SLAB_ACCOUNT
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-
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 #define kmem_zone	kmem_cache
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 #define kmem_zone_t	struct kmem_cache
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-static inline kmem_zone_t *
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-kmem_zone_init(int size, char *zone_name)
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+static inline struct page *
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+kmem_to_page(void *addr)
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 {
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-	return kmem_cache_create(zone_name, size, 0, 0, NULL);
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-}
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-
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-static inline kmem_zone_t *
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-kmem_zone_init_flags(int size, char *zone_name, slab_flags_t flags,
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-		     void (*construct)(void *))
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-{
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-	return kmem_cache_create(zone_name, size, 0, flags, construct);
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-}
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-
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-static inline void
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-kmem_zone_free(kmem_zone_t *zone, void *ptr)
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-{
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-	kmem_cache_free(zone, ptr);
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-}
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-
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-static inline void
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-kmem_zone_destroy(kmem_zone_t *zone)
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-{
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-	kmem_cache_destroy(zone);
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-}
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-
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-extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t);
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-
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-static inline void *
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-kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags)
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-{
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-	return kmem_zone_alloc(zone, flags | KM_ZERO);
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+	if (is_vmalloc_addr(addr))
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+		return vmalloc_to_page(addr);
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+	return virt_to_page(addr);
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 }
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 #endif /* __XFS_SUPPORT_KMEM_H__ */