Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 479 insertions, 0 deletions

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
new file mode 100644
index 0000000000..34734d7304
--- /dev/null
+++ b/arch/x86/include/asm/percpu.h
@@ -0,0 +1,479 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_PERCPU_H
+#define _ASM_X86_PERCPU_H
+
+#ifdef CONFIG_X86_64
+#define __percpu_seg		gs
+#else
+#define __percpu_seg		fs
+#endif
+
+#ifdef __ASSEMBLY__
+
+#ifdef CONFIG_SMP
+#define PER_CPU_VAR(var)	%__percpu_seg:var
+#else /* ! SMP */
+#define PER_CPU_VAR(var)	var
+#endif	/* SMP */
+
+#ifdef CONFIG_X86_64_SMP
+#define INIT_PER_CPU_VAR(var)  init_per_cpu__##var
+#else
+#define INIT_PER_CPU_VAR(var)  var
+#endif
+
+#else /* ...!ASSEMBLY */
+
+#include <linux/kernel.h>
+#include <linux/stringify.h>
+
+#ifdef CONFIG_SMP
+#define __percpu_prefix		"%%"__stringify(__percpu_seg)":"
+#define __my_cpu_offset		this_cpu_read(this_cpu_off)
+
+/*
+ * Compared to the generic __my_cpu_offset version, the following
+ * saves one instruction and avoids clobbering a temp register.
+ */
+#define arch_raw_cpu_ptr(ptr)				\
+({							\
+	unsigned long tcp_ptr__;			\
+	asm ("add " __percpu_arg(1) ", %0"		\
+	     : "=r" (tcp_ptr__)				\
+	     : "m" (this_cpu_off), "0" (ptr));		\
+	(typeof(*(ptr)) __kernel __force *)tcp_ptr__;	\
+})
+#else
+#define __percpu_prefix		""
+#endif
+
+#define __percpu_arg(x)		__percpu_prefix "%" #x
+
+/*
+ * Initialized pointers to per-cpu variables needed for the boot
+ * processor need to use these macros to get the proper address
+ * offset from __per_cpu_load on SMP.
+ *
+ * There also must be an entry in vmlinux_64.lds.S
+ */
+#define DECLARE_INIT_PER_CPU(var) \
+       extern typeof(var) init_per_cpu_var(var)
+
+#ifdef CONFIG_X86_64_SMP
+#define init_per_cpu_var(var)  init_per_cpu__##var
+#else
+#define init_per_cpu_var(var)  var
+#endif
+
+/* For arch-specific code, we can use direct single-insn ops (they
+ * don't give an lvalue though). */
+
+#define __pcpu_type_1 u8
+#define __pcpu_type_2 u16
+#define __pcpu_type_4 u32
+#define __pcpu_type_8 u64
+
+#define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff))
+#define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff))
+#define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff))
+#define __pcpu_cast_8(val) ((u64)(val))
+
+#define __pcpu_op1_1(op, dst) op "b " dst
+#define __pcpu_op1_2(op, dst) op "w " dst
+#define __pcpu_op1_4(op, dst) op "l " dst
+#define __pcpu_op1_8(op, dst) op "q " dst
+
+#define __pcpu_op2_1(op, src, dst) op "b " src ", " dst
+#define __pcpu_op2_2(op, src, dst) op "w " src ", " dst
+#define __pcpu_op2_4(op, src, dst) op "l " src ", " dst
+#define __pcpu_op2_8(op, src, dst) op "q " src ", " dst
+
+#define __pcpu_reg_1(mod, x) mod "q" (x)
+#define __pcpu_reg_2(mod, x) mod "r" (x)
+#define __pcpu_reg_4(mod, x) mod "r" (x)
+#define __pcpu_reg_8(mod, x) mod "r" (x)
+
+#define __pcpu_reg_imm_1(x) "qi" (x)
+#define __pcpu_reg_imm_2(x) "ri" (x)
+#define __pcpu_reg_imm_4(x) "ri" (x)
+#define __pcpu_reg_imm_8(x) "re" (x)
+
+#define percpu_to_op(size, qual, op, _var, _val)			\
+do {									\
+	__pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val);	\
+	if (0) {		                                        \
+		typeof(_var) pto_tmp__;					\
+		pto_tmp__ = (_val);					\
+		(void)pto_tmp__;					\
+	}								\
+	asm qual(__pcpu_op2_##size(op, "%[val]", __percpu_arg([var]))	\
+	    : [var] "+m" (_var)						\
+	    : [val] __pcpu_reg_imm_##size(pto_val__));			\
+} while (0)
+
+#define percpu_unary_op(size, qual, op, _var)				\
+({									\
+	asm qual (__pcpu_op1_##size(op, __percpu_arg([var]))		\
+	    : [var] "+m" (_var));					\
+})
+
+/*
+ * Generate a percpu add to memory instruction and optimize code
+ * if one is added or subtracted.
+ */
+#define percpu_add_op(size, qual, var, val)				\
+do {									\
+	const int pao_ID__ = (__builtin_constant_p(val) &&		\
+			      ((val) == 1 || (val) == -1)) ?		\
+				(int)(val) : 0;				\
+	if (0) {							\
+		typeof(var) pao_tmp__;					\
+		pao_tmp__ = (val);					\
+		(void)pao_tmp__;					\
+	}								\
+	if (pao_ID__ == 1)						\
+		percpu_unary_op(size, qual, "inc", var);		\
+	else if (pao_ID__ == -1)					\
+		percpu_unary_op(size, qual, "dec", var);		\
+	else								\
+		percpu_to_op(size, qual, "add", var, val);		\
+} while (0)
+
+#define percpu_from_op(size, qual, op, _var)				\
+({									\
+	__pcpu_type_##size pfo_val__;					\
+	asm qual (__pcpu_op2_##size(op, __percpu_arg([var]), "%[val]")	\
+	    : [val] __pcpu_reg_##size("=", pfo_val__)			\
+	    : [var] "m" (_var));					\
+	(typeof(_var))(unsigned long) pfo_val__;			\
+})
+
+#define percpu_stable_op(size, op, _var)				\
+({									\
+	__pcpu_type_##size pfo_val__;					\
+	asm(__pcpu_op2_##size(op, __percpu_arg(P[var]), "%[val]")	\
+	    : [val] __pcpu_reg_##size("=", pfo_val__)			\
+	    : [var] "p" (&(_var)));					\
+	(typeof(_var))(unsigned long) pfo_val__;			\
+})
+
+/*
+ * Add return operation
+ */
+#define percpu_add_return_op(size, qual, _var, _val)			\
+({									\
+	__pcpu_type_##size paro_tmp__ = __pcpu_cast_##size(_val);	\
+	asm qual (__pcpu_op2_##size("xadd", "%[tmp]",			\
+				     __percpu_arg([var]))		\
+		  : [tmp] __pcpu_reg_##size("+", paro_tmp__),		\
+		    [var] "+m" (_var)					\
+		  : : "memory");					\
+	(typeof(_var))(unsigned long) (paro_tmp__ + _val);		\
+})
+
+/*
+ * xchg is implemented using cmpxchg without a lock prefix. xchg is
+ * expensive due to the implied lock prefix.  The processor cannot prefetch
+ * cachelines if xchg is used.
+ */
+#define percpu_xchg_op(size, qual, _var, _nval)				\
+({									\
+	__pcpu_type_##size pxo_old__;					\
+	__pcpu_type_##size pxo_new__ = __pcpu_cast_##size(_nval);	\
+	asm qual (__pcpu_op2_##size("mov", __percpu_arg([var]),		\
+				    "%[oval]")				\
+		  "\n1:\t"						\
+		  __pcpu_op2_##size("cmpxchg", "%[nval]",		\
+				    __percpu_arg([var]))		\
+		  "\n\tjnz 1b"						\
+		  : [oval] "=&a" (pxo_old__),				\
+		    [var] "+m" (_var)					\
+		  : [nval] __pcpu_reg_##size(, pxo_new__)		\
+		  : "memory");						\
+	(typeof(_var))(unsigned long) pxo_old__;			\
+})
+
+/*
+ * cmpxchg has no such implied lock semantics as a result it is much
+ * more efficient for cpu local operations.
+ */
+#define percpu_cmpxchg_op(size, qual, _var, _oval, _nval)		\
+({									\
+	__pcpu_type_##size pco_old__ = __pcpu_cast_##size(_oval);	\
+	__pcpu_type_##size pco_new__ = __pcpu_cast_##size(_nval);	\
+	asm qual (__pcpu_op2_##size("cmpxchg", "%[nval]",		\
+				    __percpu_arg([var]))		\
+		  : [oval] "+a" (pco_old__),				\
+		    [var] "+m" (_var)					\
+		  : [nval] __pcpu_reg_##size(, pco_new__)		\
+		  : "memory");						\
+	(typeof(_var))(unsigned long) pco_old__;			\
+})
+
+#if defined(CONFIG_X86_32) && !defined(CONFIG_UML)
+#define percpu_cmpxchg64_op(size, qual, _var, _oval, _nval)		\
+({									\
+	union {								\
+		u64 var;						\
+		struct {						\
+			u32 low, high;					\
+		};							\
+	} old__, new__;							\
+									\
+	old__.var = _oval;						\
+	new__.var = _nval;						\
+									\
+	asm qual (ALTERNATIVE("leal %P[var], %%esi; call this_cpu_cmpxchg8b_emu", \
+			      "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \
+		  : [var] "+m" (_var),					\
+		    "+a" (old__.low),					\
+		    "+d" (old__.high)					\
+		  : "b" (new__.low),					\
+		    "c" (new__.high)					\
+		  : "memory", "esi");					\
+									\
+	old__.var;							\
+})
+
+#define raw_cpu_cmpxchg64(pcp, oval, nval)	percpu_cmpxchg64_op(8,         , pcp, oval, nval)
+#define this_cpu_cmpxchg64(pcp, oval, nval)	percpu_cmpxchg64_op(8, volatile, pcp, oval, nval)
+#endif
+
+#ifdef CONFIG_X86_64
+#define raw_cpu_cmpxchg64(pcp, oval, nval)	percpu_cmpxchg_op(8,         , pcp, oval, nval);
+#define this_cpu_cmpxchg64(pcp, oval, nval)	percpu_cmpxchg_op(8, volatile, pcp, oval, nval);
+
+#define percpu_cmpxchg128_op(size, qual, _var, _oval, _nval)		\
+({									\
+	union {								\
+		u128 var;						\
+		struct {						\
+			u64 low, high;					\
+		};							\
+	} old__, new__;							\
+									\
+	old__.var = _oval;						\
+	new__.var = _nval;						\
+									\
+	asm qual (ALTERNATIVE("leaq %P[var], %%rsi; call this_cpu_cmpxchg16b_emu", \
+			      "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \
+		  : [var] "+m" (_var),					\
+		    "+a" (old__.low),					\
+		    "+d" (old__.high)					\
+		  : "b" (new__.low),					\
+		    "c" (new__.high)					\
+		  : "memory", "rsi");					\
+									\
+	old__.var;							\
+})
+
+#define raw_cpu_cmpxchg128(pcp, oval, nval)	percpu_cmpxchg128_op(16,         , pcp, oval, nval)
+#define this_cpu_cmpxchg128(pcp, oval, nval)	percpu_cmpxchg128_op(16, volatile, pcp, oval, nval)
+#endif
+
+/*
+ * this_cpu_read() makes gcc load the percpu variable every time it is
+ * accessed while this_cpu_read_stable() allows the value to be cached.
+ * this_cpu_read_stable() is more efficient and can be used if its value
+ * is guaranteed to be valid across cpus.  The current users include
+ * get_current() and get_thread_info() both of which are actually
+ * per-thread variables implemented as per-cpu variables and thus
+ * stable for the duration of the respective task.
+ */
+#define this_cpu_read_stable_1(pcp)	percpu_stable_op(1, "mov", pcp)
+#define this_cpu_read_stable_2(pcp)	percpu_stable_op(2, "mov", pcp)
+#define this_cpu_read_stable_4(pcp)	percpu_stable_op(4, "mov", pcp)
+#define this_cpu_read_stable_8(pcp)	percpu_stable_op(8, "mov", pcp)
+#define this_cpu_read_stable(pcp)	__pcpu_size_call_return(this_cpu_read_stable_, pcp)
+
+#define raw_cpu_read_1(pcp)		percpu_from_op(1, , "mov", pcp)
+#define raw_cpu_read_2(pcp)		percpu_from_op(2, , "mov", pcp)
+#define raw_cpu_read_4(pcp)		percpu_from_op(4, , "mov", pcp)
+
+#define raw_cpu_write_1(pcp, val)	percpu_to_op(1, , "mov", (pcp), val)
+#define raw_cpu_write_2(pcp, val)	percpu_to_op(2, , "mov", (pcp), val)
+#define raw_cpu_write_4(pcp, val)	percpu_to_op(4, , "mov", (pcp), val)
+#define raw_cpu_add_1(pcp, val)		percpu_add_op(1, , (pcp), val)
+#define raw_cpu_add_2(pcp, val)		percpu_add_op(2, , (pcp), val)
+#define raw_cpu_add_4(pcp, val)		percpu_add_op(4, , (pcp), val)
+#define raw_cpu_and_1(pcp, val)		percpu_to_op(1, , "and", (pcp), val)
+#define raw_cpu_and_2(pcp, val)		percpu_to_op(2, , "and", (pcp), val)
+#define raw_cpu_and_4(pcp, val)		percpu_to_op(4, , "and", (pcp), val)
+#define raw_cpu_or_1(pcp, val)		percpu_to_op(1, , "or", (pcp), val)
+#define raw_cpu_or_2(pcp, val)		percpu_to_op(2, , "or", (pcp), val)
+#define raw_cpu_or_4(pcp, val)		percpu_to_op(4, , "or", (pcp), val)
+
+/*
+ * raw_cpu_xchg() can use a load-store since it is not required to be
+ * IRQ-safe.
+ */
+#define raw_percpu_xchg_op(var, nval)					\
+({									\
+	typeof(var) pxo_ret__ = raw_cpu_read(var);			\
+	raw_cpu_write(var, (nval));					\
+	pxo_ret__;							\
+})
+
+#define raw_cpu_xchg_1(pcp, val)	raw_percpu_xchg_op(pcp, val)
+#define raw_cpu_xchg_2(pcp, val)	raw_percpu_xchg_op(pcp, val)
+#define raw_cpu_xchg_4(pcp, val)	raw_percpu_xchg_op(pcp, val)
+
+#define this_cpu_read_1(pcp)		percpu_from_op(1, volatile, "mov", pcp)
+#define this_cpu_read_2(pcp)		percpu_from_op(2, volatile, "mov", pcp)
+#define this_cpu_read_4(pcp)		percpu_from_op(4, volatile, "mov", pcp)
+#define this_cpu_write_1(pcp, val)	percpu_to_op(1, volatile, "mov", (pcp), val)
+#define this_cpu_write_2(pcp, val)	percpu_to_op(2, volatile, "mov", (pcp), val)
+#define this_cpu_write_4(pcp, val)	percpu_to_op(4, volatile, "mov", (pcp), val)
+#define this_cpu_add_1(pcp, val)	percpu_add_op(1, volatile, (pcp), val)
+#define this_cpu_add_2(pcp, val)	percpu_add_op(2, volatile, (pcp), val)
+#define this_cpu_add_4(pcp, val)	percpu_add_op(4, volatile, (pcp), val)
+#define this_cpu_and_1(pcp, val)	percpu_to_op(1, volatile, "and", (pcp), val)
+#define this_cpu_and_2(pcp, val)	percpu_to_op(2, volatile, "and", (pcp), val)
+#define this_cpu_and_4(pcp, val)	percpu_to_op(4, volatile, "and", (pcp), val)
+#define this_cpu_or_1(pcp, val)		percpu_to_op(1, volatile, "or", (pcp), val)
+#define this_cpu_or_2(pcp, val)		percpu_to_op(2, volatile, "or", (pcp), val)
+#define this_cpu_or_4(pcp, val)		percpu_to_op(4, volatile, "or", (pcp), val)
+#define this_cpu_xchg_1(pcp, nval)	percpu_xchg_op(1, volatile, pcp, nval)
+#define this_cpu_xchg_2(pcp, nval)	percpu_xchg_op(2, volatile, pcp, nval)
+#define this_cpu_xchg_4(pcp, nval)	percpu_xchg_op(4, volatile, pcp, nval)
+
+#define raw_cpu_add_return_1(pcp, val)		percpu_add_return_op(1, , pcp, val)
+#define raw_cpu_add_return_2(pcp, val)		percpu_add_return_op(2, , pcp, val)
+#define raw_cpu_add_return_4(pcp, val)		percpu_add_return_op(4, , pcp, val)
+#define raw_cpu_cmpxchg_1(pcp, oval, nval)	percpu_cmpxchg_op(1, , pcp, oval, nval)
+#define raw_cpu_cmpxchg_2(pcp, oval, nval)	percpu_cmpxchg_op(2, , pcp, oval, nval)
+#define raw_cpu_cmpxchg_4(pcp, oval, nval)	percpu_cmpxchg_op(4, , pcp, oval, nval)
+
+#define this_cpu_add_return_1(pcp, val)		percpu_add_return_op(1, volatile, pcp, val)
+#define this_cpu_add_return_2(pcp, val)		percpu_add_return_op(2, volatile, pcp, val)
+#define this_cpu_add_return_4(pcp, val)		percpu_add_return_op(4, volatile, pcp, val)
+#define this_cpu_cmpxchg_1(pcp, oval, nval)	percpu_cmpxchg_op(1, volatile, pcp, oval, nval)
+#define this_cpu_cmpxchg_2(pcp, oval, nval)	percpu_cmpxchg_op(2, volatile, pcp, oval, nval)
+#define this_cpu_cmpxchg_4(pcp, oval, nval)	percpu_cmpxchg_op(4, volatile, pcp, oval, nval)
+
+/*
+ * Per cpu atomic 64 bit operations are only available under 64 bit.
+ * 32 bit must fall back to generic operations.
+ */
+#ifdef CONFIG_X86_64
+#define raw_cpu_read_8(pcp)			percpu_from_op(8, , "mov", pcp)
+#define raw_cpu_write_8(pcp, val)		percpu_to_op(8, , "mov", (pcp), val)
+#define raw_cpu_add_8(pcp, val)			percpu_add_op(8, , (pcp), val)
+#define raw_cpu_and_8(pcp, val)			percpu_to_op(8, , "and", (pcp), val)
+#define raw_cpu_or_8(pcp, val)			percpu_to_op(8, , "or", (pcp), val)
+#define raw_cpu_add_return_8(pcp, val)		percpu_add_return_op(8, , pcp, val)
+#define raw_cpu_xchg_8(pcp, nval)		raw_percpu_xchg_op(pcp, nval)
+#define raw_cpu_cmpxchg_8(pcp, oval, nval)	percpu_cmpxchg_op(8, , pcp, oval, nval)
+
+#define this_cpu_read_8(pcp)			percpu_from_op(8, volatile, "mov", pcp)
+#define this_cpu_write_8(pcp, val)		percpu_to_op(8, volatile, "mov", (pcp), val)
+#define this_cpu_add_8(pcp, val)		percpu_add_op(8, volatile, (pcp), val)
+#define this_cpu_and_8(pcp, val)		percpu_to_op(8, volatile, "and", (pcp), val)
+#define this_cpu_or_8(pcp, val)			percpu_to_op(8, volatile, "or", (pcp), val)
+#define this_cpu_add_return_8(pcp, val)		percpu_add_return_op(8, volatile, pcp, val)
+#define this_cpu_xchg_8(pcp, nval)		percpu_xchg_op(8, volatile, pcp, nval)
+#define this_cpu_cmpxchg_8(pcp, oval, nval)	percpu_cmpxchg_op(8, volatile, pcp, oval, nval)
+#endif
+
+static __always_inline bool x86_this_cpu_constant_test_bit(unsigned int nr,
+                        const unsigned long __percpu *addr)
+{
+	unsigned long __percpu *a =
+		(unsigned long __percpu *)addr + nr / BITS_PER_LONG;
+
+#ifdef CONFIG_X86_64
+	return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_8(*a)) != 0;
+#else
+	return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_4(*a)) != 0;
+#endif
+}
+
+static inline bool x86_this_cpu_variable_test_bit(int nr,
+                        const unsigned long __percpu *addr)
+{
+	bool oldbit;
+
+	asm volatile("btl "__percpu_arg(2)",%1"
+			CC_SET(c)
+			: CC_OUT(c) (oldbit)
+			: "m" (*(unsigned long __percpu *)addr), "Ir" (nr));
+
+	return oldbit;
+}
+
+#define x86_this_cpu_test_bit(nr, addr)			\
+	(__builtin_constant_p((nr))			\
+	 ? x86_this_cpu_constant_test_bit((nr), (addr))	\
+	 : x86_this_cpu_variable_test_bit((nr), (addr)))
+
+
+#include <asm-generic/percpu.h>
+
+/* We can use this directly for local CPU (faster). */
+DECLARE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off);
+
+#endif /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_SMP
+
+/*
+ * Define the "EARLY_PER_CPU" macros.  These are used for some per_cpu
+ * variables that are initialized and accessed before there are per_cpu
+ * areas allocated.
+ */
+
+#define	DEFINE_EARLY_PER_CPU(_type, _name, _initvalue)			\
+	DEFINE_PER_CPU(_type, _name) = _initvalue;			\
+	__typeof__(_type) _name##_early_map[NR_CPUS] __initdata =	\
+				{ [0 ... NR_CPUS-1] = _initvalue };	\
+	__typeof__(_type) *_name##_early_ptr __refdata = _name##_early_map
+
+#define DEFINE_EARLY_PER_CPU_READ_MOSTLY(_type, _name, _initvalue)	\
+	DEFINE_PER_CPU_READ_MOSTLY(_type, _name) = _initvalue;		\
+	__typeof__(_type) _name##_early_map[NR_CPUS] __initdata =	\
+				{ [0 ... NR_CPUS-1] = _initvalue };	\
+	__typeof__(_type) *_name##_early_ptr __refdata = _name##_early_map
+
+#define EXPORT_EARLY_PER_CPU_SYMBOL(_name)			\
+	EXPORT_PER_CPU_SYMBOL(_name)
+
+#define DECLARE_EARLY_PER_CPU(_type, _name)			\
+	DECLARE_PER_CPU(_type, _name);				\
+	extern __typeof__(_type) *_name##_early_ptr;		\
+	extern __typeof__(_type)  _name##_early_map[]
+
+#define DECLARE_EARLY_PER_CPU_READ_MOSTLY(_type, _name)		\
+	DECLARE_PER_CPU_READ_MOSTLY(_type, _name);		\
+	extern __typeof__(_type) *_name##_early_ptr;		\
+	extern __typeof__(_type)  _name##_early_map[]
+
+#define	early_per_cpu_ptr(_name) (_name##_early_ptr)
+#define	early_per_cpu_map(_name, _idx) (_name##_early_map[_idx])
+#define	early_per_cpu(_name, _cpu) 				\
+	*(early_per_cpu_ptr(_name) ?				\
+		&early_per_cpu_ptr(_name)[_cpu] :		\
+		&per_cpu(_name, _cpu))
+
+#else	/* !CONFIG_SMP */
+#define	DEFINE_EARLY_PER_CPU(_type, _name, _initvalue)		\
+	DEFINE_PER_CPU(_type, _name) = _initvalue
+
+#define DEFINE_EARLY_PER_CPU_READ_MOSTLY(_type, _name, _initvalue)	\
+	DEFINE_PER_CPU_READ_MOSTLY(_type, _name) = _initvalue
+
+#define EXPORT_EARLY_PER_CPU_SYMBOL(_name)			\
+	EXPORT_PER_CPU_SYMBOL(_name)
+
+#define DECLARE_EARLY_PER_CPU(_type, _name)			\
+	DECLARE_PER_CPU(_type, _name)
+
+#define DECLARE_EARLY_PER_CPU_READ_MOSTLY(_type, _name)		\
+	DECLARE_PER_CPU_READ_MOSTLY(_type, _name)
+
+#define	early_per_cpu(_name, _cpu) per_cpu(_name, _cpu)
+#define	early_per_cpu_ptr(_name) NULL
+/* no early_per_cpu_map() */
+
+#endif	/* !CONFIG_SMP */
+
+#endif /* _ASM_X86_PERCPU_H */