sparc: use .data.init_task section for init_thread_union

Use a dedicated aligned section for the init_thread_union
variable and declare this section in vmlinux.lds.

This align sparc with most other architectures.  Eventually this allow
the init_task bits to be unified across all architectures.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/init_task.c

@@ -23,6 +23,5 @@ EXPORT_SYMBOL(init_task);
  * in etrap.S which assumes it.
  */
 union thread_union init_thread_union
-	__attribute__((section (".text\"\n\t#")))
-	__attribute__((aligned (THREAD_SIZE)))
+	__attribute__((section (".data.init_task")))
 	= { INIT_THREAD_INFO(init_task) };

arch/sparc/kernel/vmlinux.lds.S

@@ -1,7 +1,9 @@
 /* ld script for sparc32/sparc64 kernel */
 
 #include <asm-generic/vmlinux.lds.h>
+
 #include <asm/page.h>
+#include <asm/thread_info.h>
 
 #ifdef CONFIG_SPARC32
 #define INITIAL_ADDRESS  0x10000 + SIZEOF_HEADERS
@@ -65,8 +67,15 @@ SECTIONS
 	.data.read_mostly : {
 		*(.data.read_mostly)
 	}
+	/* End of data section */
 	_edata = .;
 	PROVIDE (edata = .);
+
+	/* init_task */
+	. = ALIGN(THREAD_SIZE);
+	.data.init_task : {
+		*(.data.init_task)
+	}
 	.fixup : {
 		__start___fixup = .;
 		*(.fixup)