Merge tag 'asm-generic-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic header updates from Arnd Bergmann:
 "A series from Thomas Weißschuh cleans up the UAPI header files to no
  longer contain any references to Kconfig symbols, as these make no
  sense in userspace.

  The build-time check for these was originally added by Sam Ravnborg in
  linux-2.6.28, and a later version started warning for all newly added
  CONFIG_* checks here but kept a list of known exceptions. With the
  last exceptions gone from that list, the warning is now unconditional
  in 'make headers_install'.

  John Garry contributed a cleanup of cpumask_of_node()"

* tag 'asm-generic-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  scripts: headers_install.sh: Remove config leak ignore machinery
  x86/uapi: Stop leaking kconfig references to userspace
  nios2: uapi: Remove custom asm/swab.h from UAPI
  ARM: uapi: Drop PSR_ENDSTATE
  ARC: Always use SWAPE instructions for __arch_swab32()
  include/asm-generic/topology.h: Remove unused definition of cpumask_of_node()

Author: torvalds

arch/arc/Kconfig

@@ -121,7 +121,6 @@ choice
 config ARC_CPU_770
 	bool "ARC770"
 	depends on ISA_ARCOMPACT
-	select ARC_HAS_SWAPE
 	help
 	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
 	  This core has a bunch of cool new features:
@@ -340,10 +339,6 @@ config ARC_HAS_LLSC
 	default y
 	depends on !ARC_CANT_LLSC
 
-config ARC_HAS_SWAPE
-	bool "Insn: SWAPE (endian-swap)"
-	default y
-
 if ISA_ARCV2
 
 config ARC_USE_UNALIGNED_MEM_ACCESS

arch/arc/Makefile

@@ -9,7 +9,7 @@ ifeq ($(CROSS_COMPILE),)
 CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-)
 endif
 
-cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
+cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -mswape -D__linux__
 
 tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT)	:= -mcpu=arc700
 tune-mcpu-def-$(CONFIG_ISA_ARCV2)	:= -mcpu=hs38
@@ -41,7 +41,6 @@ endif
 cflags-y				+= -fsection-anchors
 
 cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
-cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
 
 ifdef CONFIG_ISA_ARCV2
 

arch/arc/include/uapi/asm/swab.h

@@ -19,9 +19,6 @@
 
 #include <linux/types.h>
 
-/* Native single cycle endian swap insn */
-#ifdef CONFIG_ARC_HAS_SWAPE
-
 #define __arch_swab32(x)		\
 ({					\
 	unsigned int tmp = x;		\
@@ -32,66 +29,6 @@
 	tmp;				\
 })
 
-#else
-
-/* Several ways of Endian-Swap Emulation for ARC
- * 0: kernel generic
- * 1: ARC optimised "C"
- * 2: ARC Custom instruction
- */
-#define ARC_BSWAP_TYPE	1
-
-#if (ARC_BSWAP_TYPE == 1)		/******* Software only ********/
-
-/* The kernel default implementation of htonl is
- *		return  x<<24 | x>>24 |
- *		 (x & (__u32)0x0000ff00UL)<<8 | (x & (__u32)0x00ff0000UL)>>8;
- *
- * This generates 9 instructions on ARC (excluding the ld/st)
- *
- * 8051fd8c:	ld     r3,[r7,20]	; Mem op : Get the value to be swapped
- * 8051fd98:	asl    r5,r3,24		; get  3rd Byte
- * 8051fd9c:	lsr    r2,r3,24		; get  0th Byte
- * 8051fda0:	and    r4,r3,0xff00
- * 8051fda8:	asl    r4,r4,8		; get 1st Byte
- * 8051fdac:	and    r3,r3,0x00ff0000
- * 8051fdb4:	or     r2,r2,r5		; combine 0th and 3rd Bytes
- * 8051fdb8:	lsr    r3,r3,8		; 2nd Byte at correct place in Dst Reg
- * 8051fdbc:	or     r2,r2,r4		; combine 0,3 Bytes with 1st Byte
- * 8051fdc0:	or     r2,r2,r3		; combine 0,3,1 Bytes with 2nd Byte
- * 8051fdc4:	st     r2,[r1,20]	; Mem op : save result back to mem
- *
- * Joern suggested a better "C" algorithm which is great since
- * (1) It is portable to any architecture
- * (2) At the same time it takes advantage of ARC ISA (rotate intrns)
- */
-
-#define __arch_swab32(x)					\
-({	unsigned long __in = (x), __tmp;			\
-	__tmp = __in << 8 | __in >> 24; /* ror tmp,in,24 */	\
-	__in = __in << 24 | __in >> 8; /* ror in,in,8 */	\
-	__tmp ^= __in;						\
-	__tmp &= 0xff00ff;					\
-	__tmp ^ __in;						\
-})
-
-#elif (ARC_BSWAP_TYPE == 2)	/* Custom single cycle bswap instruction */
-
-#define __arch_swab32(x)						\
-({									\
-	unsigned int tmp = x;						\
-	__asm__(							\
-	"	.extInstruction	bswap, 7, 0x00, SUFFIX_NONE, SYNTAX_2OP	\n"\
-	"	bswap  %0, %1						\n"\
-	: "=r" (tmp)							\
-	: "r" (tmp));							\
-	tmp;								\
-})
-
-#endif /* ARC_BSWAP_TYPE=zzz */
-
-#endif /* CONFIG_ARC_HAS_SWAPE */
-
 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
 #define __SWAB_64_THRU_32__
 #endif

arch/arm/include/asm/processor.h

@@ -73,7 +73,8 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset,
 		regs->ARM_cpsr = USR26_MODE;				\
 	if (elf_hwcap & HWCAP_THUMB && pc & 1)				\
 		regs->ARM_cpsr |= PSR_T_BIT;				\
-	regs->ARM_cpsr |= PSR_ENDSTATE;					\
+	if (IS_ENABLED(CONFIG_CPU_ENDIAN_BE8))				\
+		regs->ARM_cpsr |= PSR_E_BIT;				\
 	regs->ARM_pc = pc & ~1;		/* pc */			\
 	regs->ARM_sp = sp;		/* sp */			\
 })

arch/arm/include/uapi/asm/ptrace.h

@@ -102,15 +102,6 @@
 #define PSR_IT_MASK	0x0600fc00	/* If-Then execution state mask */
 #define PSR_ENDIAN_MASK	0x00000200	/* Endianness state mask */
 
-/*
- * Default endianness state
- */
-#ifdef CONFIG_CPU_ENDIAN_BE8
-#define PSR_ENDSTATE	PSR_E_BIT
-#else
-#define PSR_ENDSTATE	0
-#endif
-
 /* 
  * These are 'magic' values for PTRACE_PEEKUSR that return info about where a
  * process is located in memory.

arch/arm/kernel/signal.c

@@ -337,7 +337,8 @@ setup_return(struct pt_regs *regs, struct ksignal *ksig,
 			return 1;
 	}
 
-	cpsr |= PSR_ENDSTATE;
+	if (IS_ENABLED(CONFIG_CPU_ENDIAN_BE8))
+		cpsr |= PSR_E_BIT;
 
 	/*
 	 * Maybe we need to deliver a 32-bit signal to a 26-bit task.

arch/nios2/include/uapi/asm/swab.h arch/nios2/include/asm/swab.harch/nios2/include/uapi/asm/swab.h renamed to arch/nios2/include/asm/swab.h

@@ -11,7 +11,7 @@
 #define AT_SYSINFO_EHDR		33
 
 /* entries in ARCH_DLINFO: */
-#if defined(CONFIG_IA32_EMULATION) || !defined(CONFIG_X86_64)
+#if defined(__KERNEL__) && (defined(CONFIG_IA32_EMULATION) || !defined(CONFIG_X86_64))
 # define AT_VECTOR_SIZE_ARCH 3
 #else /* else it's non-compat x86-64 */
 # define AT_VECTOR_SIZE_ARCH 2

arch/x86/include/uapi/asm/auxvec.h

@@ -45,11 +45,7 @@
 #endif
 
 #ifndef cpumask_of_node
-  #ifdef CONFIG_NUMA
-    #define cpumask_of_node(node)	((node) == 0 ? cpu_online_mask : cpu_none_mask)
-  #else
-    #define cpumask_of_node(node)	((void)(node), cpu_online_mask)
-  #endif
+#define cpumask_of_node(node)	((void)(node), cpu_online_mask)
 #endif
 #ifndef pcibus_to_node
 #define pcibus_to_node(bus)	((void)(bus), -1)
@@ -61,7 +57,7 @@
 				 cpumask_of_node(pcibus_to_node(bus)))
 #endif
 
-#endif	/* CONFIG_NUMA */
+#endif	/* !CONFIG_NUMA */
 
 #if !defined(CONFIG_NUMA) || !defined(CONFIG_HAVE_MEMORYLESS_NODES)
 

include/asm-generic/topology.h

@@ -64,36 +64,10 @@ configs=$(sed -e '
 	d
 ' $OUTFILE)
 
-# The entries in the following list do not result in an error.
-# Please do not add a new entry. This list is only for existing ones.
-# The list will be reduced gradually, and deleted eventually. (hopefully)
-#
-# The format is <file-name>:<CONFIG-option> in each line.
-config_leak_ignores="
-arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE
-arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
-arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
-arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
-arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION
-arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64
-"
-
 for c in $configs
 do
-	leak_error=1
-
-	for ignore in $config_leak_ignores
-	do
-		if echo "$INFILE:$c" | grep -q "$ignore$"; then
-			leak_error=
-			break
-		fi
-	done
-
-	if [ "$leak_error" = 1 ]; then
-		echo "error: $INFILE: leak $c to user-space" >&2
-		exit 1
-	fi
+	echo "error: $INFILE: leak $c to user-space" >&2
+	exit 1
 done
 
 rm -f $TMPFILE