patch-2.4.21 linux-2.4.21/include/asm-alpha/floppy.h

• Lines: 36
• Date: 2003-06-13 07:51:38.000000000 -0700
• Orig file: linux-2.4.20/include/asm-alpha/floppy.h
• Orig date: 2002-11-28 15:53:15.000000000 -0800

diff -urN linux-2.4.20/include/asm-alpha/floppy.h linux-2.4.21/include/asm-alpha/floppy.h
@@ -92,25 +92,22 @@
 
 /*
  * Most Alphas have no problems with floppy DMA crossing 64k borders,
- * except for XL and RUFFIAN.  They are also the only one with DMA
- * limits, so we use that to test in the generic kernel.
+ * except for certain ones, like XL and RUFFIAN.
+ *
+ * However, the test is simple and fast, and this *is* floppy, after all,
+ * so we do it for all platforms, just to make sure.
+ *
+ * This is advantageous in other circumstances as well, as in moving
+ * about the PCI DMA windows and forcing the floppy to start doing
+ * scatter-gather when it never had before, and there *is* a problem
+ * on that platform... ;-}
  */
 
-#define __CROSS_64KB(a,s)					\
+#define CROSS_64KB(a,s)						\
 ({ unsigned long __s64 = (unsigned long)(a);			\
    unsigned long __e64 = __s64 + (unsigned long)(s) - 1;	\
    (__s64 ^ __e64) & ~0xfffful; })
 
-#ifdef CONFIG_ALPHA_GENERIC
-# define CROSS_64KB(a,s)   (__CROSS_64KB(a,s) && ~alpha_mv.max_dma_address)
-#else
-# if defined(CONFIG_ALPHA_XL) || defined(CONFIG_ALPHA_RUFFIAN) || defined(CONFIG_ALPHA_NAUTILUS)
-#  define CROSS_64KB(a,s)  __CROSS_64KB(a,s)
-# else
-#  define CROSS_64KB(a,s)  (0)
-# endif
-#endif
-
 #define EXTRA_FLOPPY_PARAMS
 
 #endif /* __ASM_ALPHA_FLOPPY_H */