Commit 6ab80d88 authored Oct 20, 2021 by Eric W. Biederman

exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit

I do not see panic calling rewind_stack_do_exit anywhere, nor can I
find anywhere in the history where doublefault_shim has called
rewind_stack_do_exit.  So I don't think this comment was ever actually
correct.

Cc: Andy Lutomirski <luto@kernel.org>
Fixes: 7d8d8cfd ("x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit")
Link: https://lkml.kernel.org/r/20211020174406.17889-1-ebiederm@xmission.com


Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

parent 6880fa6c

arch/x86/kernel/doublefault_32.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -77,9 +77,6 @@ asmlinkage noinstr void __noreturn doublefault_shim(void)
		* some way to reconstruct CR3. We could make a credible guess based
		* on cpu_tlbstate, but that would be racy and would not account for
		* PTI.
		*
		* Instead, don't bother. We can return through
		* rewind_stack_do_exit() instead.
		*/
		panic("cannot return from double fault\n");
		}