[PATCH] mspec driver build fix
Fix MSPEC driver to build for non SN2 enabled configs as the driver should
work in cached and uncached modes (no fetchop) on these systems. In
addition make MSPEC select IA64_UNCACHED_ALLOCATOR, which is required for
it and move it to arch/ia64/Kconfig to avoid warnings on non ia64
architectures running allmodconfig. Once the Kconfig code is fixed, we can
move it back.
Signed-off-by: Jes Sorensen <jes@sgi.com>
Cc: Fernando Luis Vzquez Cao <fernando@oss.ntt.co.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 5c0dec3..235e892 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -72,7 +72,11 @@
MSPEC_UNCACHED
};
+#ifdef CONFIG_SGI_SN
static int is_sn2;
+#else
+#define is_sn2 0
+#endif
/*
* One of these structures is allocated when an mspec region is mmaped. The
@@ -211,7 +215,7 @@
if (vdata->type == MSPEC_FETCHOP)
paddr = TO_AMO(maddr);
else
- paddr = __pa(TO_CAC(maddr));
+ paddr = maddr & ~__IA64_UNCACHED_OFFSET;
pfn = paddr >> PAGE_SHIFT;
@@ -335,6 +339,7 @@
* The fetchop device only works on SN2 hardware, uncached and cached
* memory drivers should both be valid on all ia64 hardware
*/
+#ifdef CONFIG_SGI_SN
if (ia64_platform_is("sn2")) {
is_sn2 = 1;
if (is_shub2()) {
@@ -363,6 +368,7 @@
goto free_scratch_pages;
}
}
+#endif
ret = misc_register(&cached_miscdev);
if (ret) {
printk(KERN_ERR "%s: failed to register device %i\n",