Re: 2.6.18 Headers - Long

[David Woodhouse <dwmw2@infradead.org>]

On Tue, 2006-07-11 at 17:35 -0700, Jim Gifford wrote:
> I will only document one issue, but there are several more like this
> in the kernel.

Please elaborate, preferably in 'diff -u' form as below...

> I'm going to use the MIPS architecture in my example, along with the 
> file page.h. 

[PATCH] Reduce user-visible noise in asm-mips/page.h

Since PAGE_SIZE is variable according to configuration options, don't
expose it to userspace. Userspace should be using sysconf(_SC_PAGE_SIZE)
instead. Move some other noise inside __KERNEL__ too while we're at it.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index 6ed1151..ee2ef88 100644
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -14,8 +14,6 @@ #ifdef __KERNEL__
 
 #include <spaces.h>
 
-#endif
-
 /*
  * PAGE_SHIFT determines the page size
  */
@@ -35,7 +33,6 @@ #define PAGE_SIZE	(1UL << PAGE_SHIFT)
 #define PAGE_MASK       (~((1 << PAGE_SHIFT) - 1))
 
 
-#ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
 extern void clear_page(void * page);
@@ -168,7 +165,6 @@ #define VM_DATA_DEFAULT_FLAGS	(VM_READ |
 #define UNCAC_ADDR(addr)	((addr) - PAGE_OFFSET + UNCAC_BASE)
 #define CAC_ADDR(addr)		((addr) - UNCAC_BASE + PAGE_OFFSET)
 
-#endif /* defined (__KERNEL__) */
 
 #ifdef CONFIG_LIMITED_DMA
 #define WANT_PAGE_VIRTUAL
@@ -177,4 +173,6 @@ #endif
 #include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>
 
+#endif /* defined (__KERNEL__) */
+
 #endif /* _ASM_PAGE_H */


-- 
dwmw2