From 88af23381ac3a04e35974d9ece422c2b6ebe7775 Mon Sep 17 00:00:00 2001 From: Thomas Meyer <thomas@m3y3r.de> Date: Thu, 6 Jul 2017 00:34:04 +0200 Subject: [PATCH] um: Add kerneldoc for segv_handler Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Richard Weinberger <richard@nod.at> --- arch/um/kernel/trap.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 59158871b9fc..4e6fcb32620f 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -183,6 +183,16 @@ void fatal_sigsegv(void) os_dump_core(); } +/** + * segv_handler() - the SIGSEGV handler + * @sig: the signal number + * @unused_si: the signal info struct; unused in this handler + * @regs: the ptrace register information + * + * The handler first extracts the faultinfo from the UML ptrace regs struct. + * If the userfault did not happen in an UML userspace process, bad_segv is called. + * Otherwise the signal did happen in a cloned userspace process, handle it. + */ void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) { struct faultinfo * fi = UPT_FAULTINFO(regs);