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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 03:29:53 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 03:29:53 +0200
commitfa453a625de5b8ee9ada0a5b329df3f88751c615 (patch)
tree7a9e04d4a44bb929e96bd9bebb7b97cb733d1ecb /arch/x86
parentMerge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze (diff)
parentum: Update defconfig (diff)
downloadlinux-fa453a625de5b8ee9ada0a5b329df3f88751c615.tar.xz
linux-fa453a625de5b8ee9ada0a5b329df3f88751c615.zip
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... ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Makefile.um4
-rw-r--r--arch/x86/um/Kconfig4
-rw-r--r--arch/x86/um/asm/processor.h10
-rw-r--r--arch/x86/um/asm/processor_32.h10
-rw-r--r--arch/x86/um/asm/processor_64.h10
-rw-r--r--arch/x86/um/bugs_32.c4
6 files changed, 13 insertions, 29 deletions
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index 36ddec6a41c9..4be406abeefd 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 b2b54d2edf53..9926e11a772d 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 2c32df6fe231..04f82e020f2b 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 018f732704dd..6c6689e574ce 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 61de92d916c3..4b02a8455bd1 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 a1fba5fb9dbe..17d88cf2c6c4 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)) {