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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/process.c
parent8d82076080d909f18dea859a6767df7e3ff69241 (diff)
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/process.c')
-rw-r--r--arch/um/kernel/process.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index bfa52f206bb..f083787410a 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -82,9 +82,9 @@ unsigned long alloc_stack(int order, int atomic)
if (atomic)
flags = GFP_ATOMIC;
page = __get_free_pages(flags, order);
- if(page == 0)
+ if (page == 0)
return 0;
- stack_protections(page);
+
return page;
}
@@ -141,7 +141,6 @@ void release_thread(struct task_struct *task)
void exit_thread(void)
{
- unprotect_stack((unsigned long) current_thread);
}
void *get_current(void)