[XTENSA] clean-up header files

The header files in the asm-xtensa directory are not clean and
'make headers_check' fails. This is a first patch to fix most of
the header files. It removes unnecessary include statements and
adds some that are required for building the kernel. The linker
script required some updates or the linking stage would fail.

Signed-off-by: Chris Zankel <[e-mail]>

arch/xtensa/kernel/setup.c

···
 #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};

arch/xtensa/kernel/vmlinux.lds.S

···
   {
     /* The .head.text section must be the first section! */
     *(.head.text)
-    *(.literal)
-    TEXT_TEXT
-    *(.srom.text)
+    *(.literal .text)
     VMLINUX_SYMBOL(__sched_text_start) = .;
     *(.sched.literal .sched.text)
     VMLINUX_SYMBOL(__sched_text_end) = .;
···
 
   }
   _etext = .;
+  PROVIDE (etext = .);
 
   . = ALIGN(16);
 
   RODATA
 
   /*  Relocation table */
-
-  . = ALIGN(16);
-  __boot_reloc_table_start = ABSOLUTE(.);
-
-  __relocate : {
-
-    RELOCATE_ENTRY(_WindowVectors_text,
-		   .WindowVectors.text);
-#if 0
-    RELOCATE_ENTRY(_KernelExceptionVector_literal,
-		   .KernelExceptionVector.literal);
-#endif
-    RELOCATE_ENTRY(_KernelExceptionVector_text,
-		   .KernelExceptionVector.text);
-#if 0
-    RELOCATE_ENTRY(_UserExceptionVector_literal,
-		   .UserExceptionVector.literal);
-#endif
-    RELOCATE_ENTRY(_UserExceptionVector_text,
-		   .UserExceptionVector.text);
-    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
-		   .DoubleExceptionVector.literal);
-    RELOCATE_ENTRY(_DoubleExceptionVector_text,
-		   .DoubleExceptionVector.text);
-  }
-  __boot_reloc_table_end = ABSOLUTE(.) ;
 
   .fixup   : { *(.fixup) }
 
···
   _fdata = .;
   .data :
   {
-    DATA_DATA
-    CONSTRUCTORS
+    *(.data) CONSTRUCTORS
     . = ALIGN(XCHAL_ICACHE_LINESIZE);
     *(.data.cacheline_aligned)
   }
···
     __tagtable_begin = .;
     *(.taglist)
     __tagtable_end = .;
+
+    . = ALIGN(16);
+    __boot_reloc_table_start = ABSOLUTE(.);
+
+    RELOCATE_ENTRY(_WindowVectors_text,
+		   .WindowVectors.text);
+    RELOCATE_ENTRY(_KernelExceptionVector_text,
+		   .KernelExceptionVector.text);
+    RELOCATE_ENTRY(_UserExceptionVector_text,
+		   .UserExceptionVector.text);
+    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
+		   .DoubleExceptionVector.literal);
+    RELOCATE_ENTRY(_DoubleExceptionVector_text,
+		   .DoubleExceptionVector.text);
+  
+    __boot_reloc_table_end = ABSOLUTE(.) ;
   }
 
   . = ALIGN(XCHAL_ICACHE_LINESIZE);
···
 
   SECURITY_INIT
 
-  . = ALIGN(4);
-
-  __start___ftr_fixup = .;
-  __ftr_fixup : { *(__ftr_fixup) }
-  __stop___ftr_fixup = .;
-
-  . = ALIGN(4096);
-  __per_cpu_start = .;
-  .data.percpu  : { *(.data.percpu) }
-  __per_cpu_end = .;
 
 #ifdef CONFIG_BLK_DEV_INITRD
   . = ALIGN(4096);
···
   .init.ramfs : { *(.init.ramfs) }
   __initramfs_end = .;
 #endif
+
+  . = ALIGN(4096);
+  __per_cpu_start = .;
+  .data.percpu  : { *(.data.percpu) }
+  __per_cpu_end = .;
+
 
   /* We need this dummy segment here */
 
···
 
   /* BSS section */
   _bss_start = .;
-  .sbss : { *(.sbss) *(.scommon) }
-  .bss : { *(COMMON) *(.bss) }
+  .bss : { *(.bss.page_aligned) *(.bss) }
   _bss_end = .;
+
   _end = .;
 
   /* only used by the boot loader  */
···
     *(.ResetVector.text)
   }
 
-
   /* Sections to be discarded */
   /DISCARD/ :
   {
-        *(.text.exit)
-	*(.text.exit.literal)
-        *(.data.exit)
+  	*(.exit.literal .exit.text)
+  	*(.exit.data)
         *(.exitcall.exit)
   }
 
+  .xt.lit : { *(.xt.lit) }
+  .xt.prop : { *(.xt.prop) }
 
   .debug  0 :  { *(.debug) }
   .line  0 :  { *(.line) }

include/asm-xtensa/bitops.h

···
 	return 31 - __cntlz(x & -x);
 }
 
-
-#ifdef __KERNEL__
-
 /*
  * ffs: Find first bit set in word. This is defined the same way as
  * the libc and compiler builtin ffs routines, therefore
···
 #include <asm-generic/bitops/ext2-non-atomic.h>
 
 #ifdef __XTENSA_EL__
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr),(addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr),(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)				\
+	test_and_set_bit((nr), (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)				\
+	test_and_clear_bit((nr), (unsigned long*)(addr))
 #elif defined(__XTENSA_EB__)
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr) ^ 0x18, (addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr)^0x18,(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)				\
+	test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)				\
+	test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
 #else
 # error processor byte order undefined!
 #endif

include/asm-xtensa/byteorder.h

···
 #define _XTENSA_BYTEORDER_H
 
 #include <asm/types.h>
+#include <linux/compiler.h>
 
 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
 {
···
 # error processor byte order undefined!
 #endif
 
-#endif /* __ASM_XTENSA_BYTEORDER_H */
+#endif /* _XTENSA_BYTEORDER_H */

include/asm-xtensa/mmu_context.h

···
 #define _XTENSA_MMU_CONTEXT_H
 
 #include <linux/stringify.h>
+#include <linux/sched.h>
 
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>

include/asm-xtensa/page.h

···
 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
 				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-#endif /* __KERNEL__ */
 #include <asm-generic/memory_model.h>
+#endif /* __KERNEL__ */
 #endif /* _XTENSA_PAGE_H */

include/asm-xtensa/param.h

···
 #ifndef _XTENSA_PARAM_H
 #define _XTENSA_PARAM_H
 
-#include <asm/variant/core.h>
-
 #ifdef __KERNEL__
 # define HZ		100		/* internal timer frequency */
 # define USER_HZ	100		/* for user interfaces in "ticks" */
 # define CLOCKS_PER_SEC (USER_HZ)	/* frequnzy at which times() counts */
 #endif
 
-#define EXEC_PAGESIZE	(1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE)
+#define EXEC_PAGESIZE	4096
 
 #ifndef NGROUPS
 #define NGROUPS		32

include/asm-xtensa/ptrace.h

···
 #ifndef _XTENSA_PTRACE_H
 #define _XTENSA_PTRACE_H
 
-#include <asm/variant/core.h>
-
 /*
  * Kernel stack
  *
···
 };
 
 #ifdef __KERNEL__
+
+#include <asm/variant/core.h>
+
 # define task_pt_regs(tsk) ((struct pt_regs*) \
   (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
 # define user_mode(regs) (((regs)->ps & 0x00000020)!=0)

include/asm-xtensa/shmparam.h

···
 #ifndef _XTENSA_SHMPARAM_H
 #define _XTENSA_SHMPARAM_H
 
-#include <asm/processor.h>
-
 /*
  * Xtensa can have variable size caches, and if
  * the size of single way is larger than the page size,

include/asm-xtensa/thread_info.h

···
 #define TIF_SINGLESTEP		4	/* restore singlestep on return to user mode */
 #define TIF_IRET		5	/* return with iret */
 #define TIF_MEMDIE		6
+#define TIF_RESTORE_SIGMASK	7	/* restore signal mask in do_signal() */
 #define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
 
 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
···
 #define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
 #define _TIF_IRET		(1<<TIF_IRET)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
 
 #define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */
 #define _TIF_ALLWORK_MASK	0x0000FFFF	/* work to do on any return to u-space */