[PATCH 4/10] linux 2.6.18: miscellaneous

[PATCH 4/10] linux 2.6.18: miscellaneous

[Jan Beulich]

Various minor changes not fitting elsewhere and not warranting separate
patches.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

Index: head-2007-02-27/arch/i386/Kconfig
===================================================================
--- head-2007-02-27.orig/arch/i386/Kconfig	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/arch/i386/Kconfig	2007-02-27 16:27:37.000000000 +0100
@@ -255,7 +255,6 @@ config NR_CPUS
 config SCHED_SMT
 	bool "SMT (Hyperthreading) scheduler support"
 	depends on X86_HT
-	depends on !X86_XEN
 	help
 	  SMT scheduler support improves the CPU scheduler's decision making
 	  when dealing with Intel Pentium 4 chips with HyperThreading at a
Index: head-2007-02-27/arch/i386/kernel/head-xen.S
===================================================================
--- head-2007-02-27.orig/arch/i386/kernel/head-xen.S	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/arch/i386/kernel/head-xen.S	2007-03-02 15:33:04.000000000 +0100
@@ -65,9 +65,6 @@ ENTRY(startup_32)
 
 	pushl %eax		# fake return address
 	jmp start_kernel
-L6:
-	jmp L6			# main should never return here, but
-				# just in case, we know what happens.
 
 #define HYPERCALL_PAGE_OFFSET 0x1000
 .org HYPERCALL_PAGE_OFFSET
Index: head-2007-02-27/arch/i386/kernel/process-xen.c
===================================================================
--- head-2007-02-27.orig/arch/i386/kernel/process-xen.c	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/arch/i386/kernel/process-xen.c	2007-02-27 16:27:37.000000000 +0100
@@ -605,7 +605,8 @@ struct task_struct fastcall * __switch_t
 		mcl++;
 	}
 
-	if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr)) {
+	if (unlikely(test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)
+	             || test_tsk_thread_flag(next_p, TIF_IO_BITMAP))) {
 		iobmp_op.bitmap   = (char *)next->io_bitmap_ptr;
 		iobmp_op.nr_ports = next->io_bitmap_ptr ? IO_BITMAP_BITS : 0;
 		mcl->op      = __HYPERVISOR_physdev_op;
Index: head-2007-02-27/include/asm-i386/mach-xen/asm/system.h
===================================================================
--- head-2007-02-27.orig/include/asm-i386/mach-xen/asm/system.h	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/include/asm-i386/mach-xen/asm/system.h	2007-02-27 16:27:37.000000000 +0100
@@ -137,7 +137,7 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t"
 })
 
 #define write_cr4(x) \
-	__asm__ __volatile__("movl %0,%%cr4": :"r" (x));
+	__asm__ __volatile__("movl %0,%%cr4": :"r" (x))
 
 /*
  * Clear and set 'TS' bit respectively
Index: head-2007-02-27/include/asm-i386/thread_info.h
===================================================================
--- head-2007-02-27.orig/include/asm-i386/thread_info.h	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/include/asm-i386/thread_info.h	2007-02-27 16:27:37.000000000 +0100
@@ -158,7 +158,11 @@ static inline struct thread_info *curren
 #define _TIF_ALLWORK_MASK	(0x0000FFFF & ~_TIF_SECCOMP)
 
 /* flags to check in __switch_to() */
+#ifndef CONFIG_XEN
 #define _TIF_WORK_CTXSW (_TIF_DEBUG|_TIF_IO_BITMAP)
+#else
+#define _TIF_WORK_CTXSW _TIF_DEBUG
+#endif
 
 /*
  * Thread-synchronous status.
Index: head-2007-02-27/arch/x86_64/Kconfig
===================================================================
--- head-2007-02-27.orig/arch/x86_64/Kconfig	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/arch/x86_64/Kconfig	2007-02-27 16:27:37.000000000 +0100
@@ -450,7 +450,7 @@ config CALGARY_IOMMU
 	bool "IBM Calgary IOMMU support"
	default y
 	select SWIOTLB
-	depends on PCI && EXPERIMENTAL
+	depends on PCI && !X86_64_XEN && EXPERIMENTAL
 	help
 	  Support for hardware IOMMUs in IBM's xSeries x366 and x460
 	  systems. Needed to run systems with more than 3GB of memory
Index: head-2007-02-27/include/asm-i386/mach-xen/asm/page.h
===================================================================
--- head-2007-02-27.orig/include/asm-i386/mach-xen/asm/page.h	2007-03-05 10:00:18.000000000 +0100
+++ head-2007-02-27/include/asm-i386/mach-xen/asm/page.h	2007-02-27 16:27:37.000000000 +0100
@@ -225,8 +225,6 @@ extern int page_is_ram(unsigned long pag
 	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
 		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-#define __HAVE_ARCH_GATE_AREA 1
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>