arm64: Remove the get_thread_info() function
This function was introduced by previous commits implementing UAO.
However, it can be replaced with task_thread_info() in
uao_thread_switch() or get_fs() in do_page_fault() (the latter being
called only on the current context, so no need for using the saved
pt_regs).
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index d0762a7..a8eafece 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -234,7 +234,7 @@
}
if (permission_fault(esr) && (addr < USER_DS)) {
- if (get_thread_info(regs->sp)->addr_limit == KERNEL_DS)
+ if (get_fs() == KERNEL_DS)
panic("Accessing user space memory with fs=KERNEL_DS");
if (!search_exception_tables(regs->pc))