Merge git://git.linux-xtensa.org/kernel/xtensa-feed

* git://git.linux-xtensa.org/kernel/xtensa-feed:
  Xtensa: use asm-generic/fcntl.h
  [XTENSA] Remove non-rt signal handling
  [XTENSA] Move common sections into bss sections
  [XTENSA] clean-up header files
  [XTENSA] Use generic 64-bit division
  [XTENSA] Remove multi-exported symbols from xtensa_ksyms.c
  [XTENSA] fix sources using deprecated assembler directive
  [XTENSA] Spelling fixes in arch/xtensa
  [XTENSA] fix bit operations in bitops.h

arch/xtensa/kernel/asm-offsets.c

@@ -39,6 +39,7 @@ int main(void)
 	DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
 	DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
 	DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
+	DEFINE(PT_ICOUNTLEVEL, offsetof (struct pt_regs, icountlevel));
 	DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
 	DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
 	DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));

arch/xtensa/kernel/entry.S

@@ -125,8 +125,9 @@ _user_exception:
 
 	movi	a2, 0
 	rsr	a3, SAR
-	wsr	a2, ICOUNTLEVEL
+	xsr	a2, ICOUNTLEVEL
 	s32i	a3, a1, PT_SAR
+	s32i	a2, a1, PT_ICOUNTLEVEL
 
 	/* Rotate ws so that the current windowbase is at bit0. */
 	/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
@@ -276,8 +277,9 @@ _kernel_exception:
 
 	movi	a2, 0
 	rsr	a3, SAR
-	wsr	a2, ICOUNTLEVEL
+	xsr	a2, ICOUNTLEVEL
 	s32i	a3, a1, PT_SAR
+	s32i	a2, a1, PT_ICOUNTLEVEL
 
 	/* Rotate ws so that the current windowbase is at bit0. */
 	/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
@@ -330,14 +332,16 @@ _kernel_exception:
 
 common_exception:
 
-	/* Save EXCVADDR, DEBUGCAUSE, and PC, and clear LCOUNT */
+	/* Save some registers, disable loops and clear the syscall flag. */
 
 	rsr	a2, DEBUGCAUSE
 	rsr	a3, EPC_1
 	s32i	a2, a1, PT_DEBUGCAUSE
 	s32i	a3, a1, PT_PC
 
+	movi	a2, -1
 	rsr	a3, EXCVADDR
+	s32i	a2, a1, PT_SYSCALL
 	movi	a2, 0
 	s32i	a3, a1, PT_EXCVADDR
 	xsr	a2, LCOUNT
@@ -450,27 +454,8 @@ common_exception_return:
 
 	/* Restore the state of the task and return from the exception. */
 
-
-	/* If we are returning from a user exception, and the process
-	 * to run next has PT_SINGLESTEP set, we want to setup
-	 * ICOUNT and ICOUNTLEVEL to step one instruction.
-	 * PT_SINGLESTEP is set by sys_ptrace (ptrace.c)
-	 */
-
 4:	/* a2 holds GET_CURRENT(a2,a1)  */
 
-	l32i	a3, a2, TI_TASK
-	l32i	a3, a3, TASK_PTRACE
-	bbci.l	a3, PT_SINGLESTEP_BIT, 1f # jump if single-step flag is not set
-
-	movi	a3, -2			# PT_SINGLESTEP flag is set,
-	movi	a4, 1			# icountlevel of 1 means it won't
-	wsr	a3, ICOUNT		# start counting until after rfe
-	wsr	a4, ICOUNTLEVEL		# so setup icount & icountlevel.
-	isync
-
-1:
-
 #if XCHAL_EXTRA_SA_SIZE
 
 	/* For user exceptions, restore the extra state from the user's TCB. */
@@ -665,6 +650,13 @@ common_exception_exit:
 	wsr	a3, LEND
 	wsr	a2, LCOUNT
 
+	/* We control single stepping through the ICOUNTLEVEL register. */
+
+	l32i	a2, a1, PT_ICOUNTLEVEL
+	movi	a3, -2
+	wsr	a2, ICOUNTLEVEL
+	wsr	a3, ICOUNT
+
 	/* Check if it was double exception. */
 
 	l32i	a0, a1, PT_DEPC

arch/xtensa/kernel/head.S

@@ -19,6 +19,8 @@
 #include <asm/page.h>
 #include <asm/cacheasm.h>
 
+#include <linux/linkage.h>
+
 /*
  * This module contains the entry code for kernel images. It performs the
  * minimal setup needed to call the generic C routines.
@@ -227,13 +229,14 @@ _startup:
 should_never_return:
 	j	should_never_return
 
-	/* Define some common data structures here.  We define them
-	 * here in this assembly file due to their unusual alignment
-	 * requirements.
-	 */
 
-	.comm   swapper_pg_dir,PAGE_SIZE,PAGE_SIZE
-	.comm	empty_bad_page_table,PAGE_SIZE,PAGE_SIZE
-	.comm	empty_bad_page,PAGE_SIZE,PAGE_SIZE
-	.comm	empty_zero_page,PAGE_SIZE,PAGE_SIZE
+/*
+ * BSS section
+ */
+
+.section ".bss.page_aligned", "w"
+ENTRY(swapper_pg_dir)
+	.fill	PAGE_SIZE, 1, 0
+ENTRY(empty_zero_page)
+	.fill	PAGE_SIZE, 1, 0
 

arch/xtensa/kernel/pci.c

@@ -401,7 +401,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  * Also, think for a moment about likes of floppy.c that
  * include architecture specific parts. They may want to redefine ins/outs.
  *
- * We do not use horroble macroses here because we want to
+ * We do not use horrible macros here because we want to
  * advance pointer by sizeof(size).
  */
 void outsb(unsigned long addr, const void *src, unsigned long count) {

arch/xtensa/kernel/setup.c

@@ -41,6 +41,7 @@
 #include <asm/platform.h>
 #include <asm/page.h>
 #include <asm/setup.h>
+#include <asm/param.h>
 
 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
 struct screen_info screen_info = { 0, 24, 0, 0, 0, 80, 0, 0, 0, 24, 1, 16};