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| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 01:26:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:04 -0700 |
| commit | 5c8aaceab88ac787c0a4038b29143c954c2a45e0 (patch) | |
| tree | 9277518e77cac9e1f97d826fa8962d1c861a9e40 /arch/um/kernel/process.c | |
| parent | 8d82076080d909f18dea859a6767df7e3ff69241 (diff) | |
| download | linux-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/process.c')
| -rw-r--r-- | arch/um/kernel/process.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index bfa52f206bb6..f083787410af 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) |