linux-kernel - [PATCH 6/7] UML - Remove init_irq

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Date:	Wed, 2 Jan 2008 15:08:54 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 6/7] UML - Remove init_irq_signals

init_irq_signals doesn't need to be called from the context of a new
process.  It initializes handlers, which are useless in process
context.  With that call gone, init_irq_signals has only one caller,
so it can be inlined into init_new_thread_signals.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
 arch/um/include/os.h       |    1 -
 arch/um/os-Linux/irq.c     |   11 -----------
 arch/um/os-Linux/process.c |    5 ++++-
 3 files changed, 4 insertions(+), 13 deletions(-)

Index: linux-2.6-git/arch/um/include/os.h
===================================================================
--- linux-2.6-git.orig/arch/um/include/os.h	2007-12-13 12:43:29.000000000 -0500
+++ linux-2.6-git/arch/um/include/os.h	2007-12-13 17:48:06.000000000 -0500
@@ -285,7 +285,6 @@ extern void os_free_irq_later(struct irq
 extern int os_get_pollfd(int i);
 extern void os_set_pollfd(int i, int fd);
 extern void os_set_ioignore(void);
-extern void init_irq_signals(int on_sigstack);
 
 /* sigio.c */
 extern int add_sigio_fd(int fd);
Index: linux-2.6-git/arch/um/os-Linux/irq.c
===================================================================
--- linux-2.6-git.orig/arch/um/os-Linux/irq.c	2007-12-13 12:43:21.000000000 -0500
+++ linux-2.6-git/arch/um/os-Linux/irq.c	2007-12-13 17:48:06.000000000 -0500
@@ -136,14 +136,3 @@ void os_set_ioignore(void)
 {
 	signal(SIGIO, SIG_IGN);
 }
-
-void init_irq_signals(int on_sigstack)
-{
-	int flags;
-
-	flags = on_sigstack ? SA_ONSTACK : 0;
-
-	set_handler(SIGIO, (__sighandler_t) sig_handler, flags | SA_RESTART,
-		    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
-	signal(SIGWINCH, SIG_IGN);
-}
Index: linux-2.6-git/arch/um/os-Linux/process.c
===================================================================
--- linux-2.6-git.orig/arch/um/os-Linux/process.c	2007-12-13 12:42:57.000000000 -0500
+++ linux-2.6-git/arch/um/os-Linux/process.c	2007-12-13 17:48:06.000000000 -0500
@@ -249,7 +249,10 @@ void init_new_thread_signals(void)
 		    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
 	signal(SIGHUP, SIG_IGN);
 
-	init_irq_signals(1);
+	set_handler(SIGIO, (__sighandler_t) sig_handler,
+		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM,
+		    SIGVTALRM, -1);
+	signal(SIGWINCH, SIG_IGN);
 }
 
 int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr)
--
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