[linuxsh-dev] unmapped area for 16KB alignment

[NIIBE Y. <gn...@m1...>]

In current implementation, we get 4-KB alignment for mmap, 16KB when
shared.  It's better to have 16KB alignment all the time, because we
can share the cache entries.

Index: arch/sh/kernel/sys_sh.c
===================================================================
RCS file: /cvsroot/linuxsh/kernel/arch/sh/kernel/sys_sh.c,v
retrieving revision 1.6
diff -u -r1.6 sys_sh.c
--- arch/sh/kernel/sys_sh.c	2001/06/30 09:18:39	1.6
+++ arch/sh/kernel/sys_sh.c	2001/08/03 11:56:49
@@ -68,10 +68,7 @@
 	if (!addr)
 		addr = TASK_UNMAPPED_BASE;
 
-	if (flags & MAP_SHARED)
-		addr = COLOUR_ALIGN(addr);
-	else
-		addr = PAGE_ALIGN(addr);
+	addr = COLOUR_ALIGN(addr);
 
 	for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
 		/* At this point:  (!vma || addr < vma->vm_end). */
@@ -80,8 +77,7 @@
 		if (!vma || addr + len <= vma->vm_start)
 			return addr;
 		addr = vma->vm_end;
-		if (flags & MAP_SHARED)
-			addr = COLOUR_ALIGN(addr);
+		addr = COLOUR_ALIGN(addr);
 	}
 }
 #endif
--