Merge commit '5bc66170dc486556a1e36fd384463536573f4b82' into x86/urgent

From Borislav Petkov <bp@amd64.org>:

Below is a RAS fix which reverts the addition of a sysfs attribute
which we agreed is not needed, post-factum. And this should go in now
because that sysfs attribute is going to end up in 3.7 otherwise and
thus exposed to userspace; removing it then would be a lot harder.

This is done as a merge rather than a simple patch/cherry-pick since
the baseline for this patch was not in the previous x86/urgent.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/avr32/include/uapi/asm/swab.h b/arch/avr32/include/uapi/asm/swab.h
new file mode 100644
index 000000000000..14cc737bbca6
--- /dev/null
+++ b/arch/avr32/include/uapi/asm/swab.h
@@ -0,0 +1,35 @@
+/*
+ * AVR32 byteswapping functions.
+ */
+#ifndef __ASM_AVR32_SWAB_H
+#define __ASM_AVR32_SWAB_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#define __SWAB_64_THRU_32__
+
+#ifdef __CHECKER__
+extern unsigned long __builtin_bswap_32(unsigned long x);
+extern unsigned short __builtin_bswap_16(unsigned short x);
+#endif
+
+/*
+ * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
+ * the result.
+ */
+#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
+static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
+{
+	return __builtin_bswap_16(val);
+}
+#define __arch_swab16 __arch_swab16
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+	return __builtin_bswap_32(val);
+}
+#define __arch_swab32 __arch_swab32
+#endif
+
+#endif /* __ASM_AVR32_SWAB_H */