The patch titled
cleanup: Initialize esp0 properly all the time
has been removed from the -mm tree. Its filename was
cleanup-initialize-esp0-properly-all-the-time.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: cleanup: Initialize esp0 properly all the time
From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Whenever we schedule, __switch_to calls load_esp0 which does:
tss->esp0 = thread->esp0;
This is never initialized for the initial thread (ie "swapper"), so when we're
scheduling that, we end up setting esp0 to 0. This is fine: the swapper never
leaves ring 0, so this field is never used.
lguest, however, gets upset that we're trying to used an unmapped page as our
kernel stack. Rather than work around it there, let's initialize it.
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-i386/processor.h | 1 +
1 file changed, 1 insertion(+)
diff -puN include/asm-i386/processor.h~cleanup-initialize-esp0-properly-all-the-time include/asm-i386/processor.h
--- a/include/asm-i386/processor.h~cleanup-initialize-esp0-properly-all-the-time
+++ a/include/asm-i386/processor.h
@@ -421,6 +421,7 @@ struct thread_struct {
};
#define INIT_THREAD { \
+ .esp0 = sizeof(init_stack) + (long)&init_stack, \
.vm86_info = NULL, \
.sysenter_cs = __KERNEL_CS, \
.io_bitmap_ptr = NULL, \
_
Patches currently in -mm which might be from rusty@xxxxxxxxxxxxxxx are
git-kbuild.patch
git-net.patch
allow-per-cpu-variables-to-be-page-aligned.patch
array_size-check-for-type.patch
array_size-check-for-type-uml-fix.patch
module-use-krealloc.patch
extend-print_symbol-capability.patch
extend-print_symbol-capability-fix.patch
futex-restartable-futex_wait.patch
futex-restartable-futex_wait-fix.patch
add-ability-to-keep-track-of-callers-of-symbol_getput.patch
add-ability-to-keep-track-of-callers-of-symbol_getput-update.patch
update-mtd-use-of-symbol_getput.patch
update-dvb-use-of-symbol_getput.patch
____call_usermodehelper-dont-flush_signals.patch
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