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authorJeff Dike <jdike@addtoit.com>2007-10-16 01:26:46 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:04 -0700
commit5c8aaceab88ac787c0a4038b29143c954c2a45e0 (patch)
tree9277518e77cac9e1f97d826fa8962d1c861a9e40 /arch/um/kernel/init_task.c
parent8d82076080d909f18dea859a6767df7e3ff69241 (diff)
downloadlinux-5c8aaceab88ac787c0a4038b29143c954c2a45e0.tar.gz
uml: stop specially protecting kernel stacks
Map all of physical memory as executable to avoid having to change stack protections during fork and exit. unprotect_stack is now called only from MODE_TT code, so it is marked as such. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel/init_task.c')
-rw-r--r--arch/um/kernel/init_task.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index cba516e6c99a27..fa90db964b2873 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -47,7 +47,9 @@ union thread_union cpu0_irqstack
__attribute__((__section__(".data.init_irqstack"))) =
{ INIT_THREAD_INFO(init_task) };
+#ifdef CONFIG_MODE_TT
void unprotect_stack(unsigned long stack)
{
os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
}
+#endif