Merge branch 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML changes from Richard Weinberger:
 "Mostly bug fixes and cleanups"

* 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (35 commits)
  um: Update defconfig
  um: Switch to large mcmodel on x86_64
  MTD: Relax dependencies
  um: Wire CONFIG_GENERIC_IO up
  um: Serve io_remap_pfn_range()
  Introduce CONFIG_GENERIC_IO
  um: allow SUBARCH=x86
  um: most of the SUBARCH uses can be killed
  um: deadlock in line_write_interrupt()
  um: don't bother trying to rebuild CHECKFLAGS for USER_OBJS
  um: use the right ifdef around exports in user_syms.c
  um: a bunch of headers can be killed by using generic-y
  um: ptrace-generic.h doesn't need user.h
  um: kill HOST_TASK_PID
  um: remove pointless include of asm/fixmap.h from asm/pgtable.h
  um: asm-offsets.h might as well come from underlying arch...
  um: merge processor_{32,64}.h a bit...
  um: switch close_chan() to struct line
  um: race fix: initialize delayed_work *before* registering IRQ
  um: line->have_irq is never checked...
  ...

6 files changed, 13 insertions, 29 deletions

diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index 36ddec6a41c..4be406abeef 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -8,15 +8,11 @@ ELF_ARCH		:= i386
 ELF_FORMAT 		:= elf32-i386
 CHECKFLAGS	+= -D__i386__
 
-ifeq ("$(origin SUBARCH)", "command line")
-ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)")
 KBUILD_CFLAGS		+= $(call cc-option,-m32)
 KBUILD_AFLAGS		+= $(call cc-option,-m32)
 LINK-y			+= $(call cc-option,-m32)
 
 export LDFLAGS
-endif
-endif
 
 # First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
 include $(srctree)/arch/x86/Makefile_32.cpu
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index b2b54d2edf5..9926e11a772 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -15,8 +15,8 @@ config UML_X86
 	select GENERIC_FIND_FIRST_BIT
 
 config 64BIT
-	bool
-	default SUBARCH = "x86_64"
+	bool "64-bit kernel" if SUBARCH = "x86"
+	default SUBARCH != "i386"
 
 config X86_32
 	def_bool !64BIT
diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h
index 2c32df6fe23..04f82e020f2 100644
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@@ -17,6 +17,16 @@
 #define ARCH_IS_STACKGROW(address) \
        (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
 
+#include <asm/user.h>
+
+/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+static inline void rep_nop(void)
+{
+	__asm__ __volatile__("rep;nop": : :"memory");
+}
+
+#define cpu_relax()	rep_nop()
+
 #include <asm/processor-generic.h>
 
 #endif
diff --git a/arch/x86/um/asm/processor_32.h b/arch/x86/um/asm/processor_32.h
index 018f732704d..6c6689e574c 100644
--- a/arch/x86/um/asm/processor_32.h
+++ b/arch/x86/um/asm/processor_32.h
@@ -45,16 +45,6 @@ static inline void arch_copy_thread(struct arch_thread *from,
         memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
 }
 
-#include <asm/user.h>
-
-/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
-static inline void rep_nop(void)
-{
-	__asm__ __volatile__("rep;nop": : :"memory");
-}
-
-#define cpu_relax()	rep_nop()
-
 /*
  * Default implementation of macro that returns current
  * instruction pointer ("program counter"). Stolen
diff --git a/arch/x86/um/asm/processor_64.h b/arch/x86/um/asm/processor_64.h
index 61de92d916c..4b02a8455bd 100644
--- a/arch/x86/um/asm/processor_64.h
+++ b/arch/x86/um/asm/processor_64.h
@@ -14,14 +14,6 @@ struct arch_thread {
         struct faultinfo faultinfo;
 };
 
-/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
-static inline void rep_nop(void)
-{
-	__asm__ __volatile__("rep;nop": : :"memory");
-}
-
-#define cpu_relax()   rep_nop()
-
 #define INIT_ARCH_THREAD { .debugregs  		= { [ 0 ... 7 ] = 0 }, \
 			   .debugregs_seq	= 0, \
 			   .fs			= 0, \
@@ -37,8 +29,6 @@ static inline void arch_copy_thread(struct arch_thread *from,
 	to->fs = from->fs;
 }
 
-#include <asm/user.h>
-
 #define current_text_addr() \
 	({ void *pc; __asm__("movq $1f,%0\n1:":"=g" (pc)); pc; })
 
diff --git a/arch/x86/um/bugs_32.c b/arch/x86/um/bugs_32.c
index a1fba5fb9db..17d88cf2c6c 100644
--- a/arch/x86/um/bugs_32.c
+++ b/arch/x86/um/bugs_32.c
@@ -13,8 +13,6 @@
 static int host_has_cmov = 1;
 static jmp_buf cmov_test_return;
 
-#define TASK_PID(task) *((int *) &(((char *) (task))[HOST_TASK_PID]))
-
 static void cmov_sigill_test_handler(int sig)
 {
 	host_has_cmov = 0;
@@ -51,7 +49,7 @@ void arch_examine_signal(int sig, struct uml_pt_regs *regs)
 	 * This is testing for a cmov (0x0f 0x4x) instruction causing a
 	 * SIGILL in init.
 	 */
-	if ((sig != SIGILL) || (TASK_PID(get_current()) != 1))
+	if ((sig != SIGILL) || (get_current_pid() != 1))
 		return;
 
 	if (copy_from_user_proc(tmp, (void *) UPT_IP(regs), 2)) {