Merge branch 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  x86: canonicalize remaining header guards
  x86: drop double underscores from header guards
  x86: Fix ASM_X86__ header guards
  x86, um: get rid of uml-config.h
  x86, um: get rid of arch/um/Kconfig.arch
  x86, um: get rid of arch/um/os symlink
  x86, um: get rid of excessive includes of uml-config.h
  x86, um: get rid of header symlinks
  x86, um: merge Kconfig.i386 and Kconfig.x86_64
  x86, um: get rid of sysdep symlink
  x86, um: trim the junk from uml ptrace-*.h
  x86, um: take vm-flags.h to sysdep
  x86, um: get rid of uml asm/arch
  x86, um: get rid of uml highmem.h
  x86, um: get rid of uml unistd.h
  x86, um: get rid of system.h -> system.h include
  x86, um: uml atomic.h is not needed anymore
  x86, um: untangle uml ldt.h
  x86, um: get rid of more uml asm/arch uses
  x86, um: remove dead header (uml module-generic.h; never used these days)
  ...

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/x86/include/asm/processor-cyrix.h b/arch/x86/include/asm/processor-cyrix.h
new file mode 100644
index 000000000000..1198f2a0e42c
--- /dev/null
+++ b/arch/x86/include/asm/processor-cyrix.h
@@ -0,0 +1,38 @@
+/*
+ * NSC/Cyrix CPU indexed register access. Must be inlined instead of
+ * macros to ensure correct access ordering
+ * Access order is always 0x22 (=offset), 0x23 (=value)
+ *
+ * When using the old macros a line like
+ *   setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88);
+ * gets expanded to:
+ *  do {
+ *    outb((CX86_CCR2), 0x22);
+ *    outb((({
+ *        outb((CX86_CCR2), 0x22);
+ *        inb(0x23);
+ *    }) | 0x88), 0x23);
+ *  } while (0);
+ *
+ * which in fact violates the access order (= 0x22, 0x22, 0x23, 0x23).
+ */
+
+static inline u8 getCx86(u8 reg)
+{
+	outb(reg, 0x22);
+	return inb(0x23);
+}
+
+static inline void setCx86(u8 reg, u8 data)
+{
+	outb(reg, 0x22);
+	outb(data, 0x23);
+}
+
+#define getCx86_old(reg) ({ outb((reg), 0x22); inb(0x23); })
+
+#define setCx86_old(reg, data) do { \
+	outb((reg), 0x22); \
+	outb((data), 0x23); \
+} while (0)
+