x86, mm: rename TASK_SIZE64 => TASK_SIZE_MAX

Impact: cleanup

Rename TASK_SIZE64 to TASK_SIZE_MAX, and provide the
define on 32-bit too. (mapped to TASK_SIZE)

This allows 32-bit code to make use of the (former-) TASK_SIZE64
symbol as well, in a clean way.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 9c2dc5d..6fa9f17 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -963,7 +963,7 @@
 #ifdef CONFIG_X86_32
 	return address >= TASK_SIZE;
 #else
-	return address >= TASK_SIZE64;
+	return address >= TASK_SIZE_MAX;
 #endif
 }