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authorJeff Dike <jdike@addtoit.com>2007-10-16 01:27:27 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:08 -0700
commit61b63c556c0877ee6d3832ee641bc427ff4d94d6 (patch)
treee35a047a7b11f349d3d68ac18639bc33801ec001 /arch
parent5f734614fc6218db352d26571ab4d1604620199c (diff)
uml: eliminate SIGALRM
Now that ITIMER_REAL is no longer used, there is no need for any use of SIGALRM whatsoever. This patch removes all mention of it. In addition, real_alarm_handler took a signal argument which is now always SIGVTALRM. So, that is gone. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/um/os-Linux/irq.c2
-rw-r--r--arch/um/os-Linux/main.c2
-rw-r--r--arch/um/os-Linux/process.c10
-rw-r--r--arch/um/os-Linux/signal.c28
-rw-r--r--arch/um/os-Linux/skas/process.c4
-rw-r--r--arch/um/os-Linux/skas/trap.c5
-rw-r--r--arch/um/os-Linux/trap.c1
7 files changed, 17 insertions, 35 deletions
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index 2fe482219b6b..6aa6f95d6524 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -146,6 +146,6 @@ void init_irq_signals(int on_sigstack)
flags = on_sigstack ? SA_ONSTACK : 0;
set_handler(SIGIO, (__sighandler_t) sig_handler, flags | SA_RESTART,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
signal(SIGWINCH, SIG_IGN);
}
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 1518f7a45a24..82c3778627b8 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -161,7 +161,7 @@ int __init main(int argc, char **argv, char **envp)
* some time) and cause a segfault.
*/
- /* stop timers and set SIG*ALRM to be ignored */
+ /* stop timers and set SIGVTALRM to be ignored */
disable_timer();
/* disable SIGIO for the fds and set SIGIO to be ignored */
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 90b480cf78f4..37781db4ceca 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -238,15 +238,15 @@ out:
void init_new_thread_signals(void)
{
set_handler(SIGSEGV, (__sighandler_t) sig_handler, SA_ONSTACK,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
set_handler(SIGTRAP, (__sighandler_t) sig_handler, SA_ONSTACK,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
set_handler(SIGFPE, (__sighandler_t) sig_handler, SA_ONSTACK,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
set_handler(SIGILL, (__sighandler_t) sig_handler, SA_ONSTACK,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
signal(SIGHUP, SIG_IGN);
init_irq_signals(1);
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index fbad174775ee..e9800b0b5689 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -15,8 +15,7 @@
#include "user.h"
/*
- * These are the asynchronous signals. SIGVTALRM and SIGARLM are handled
- * together under SIGVTALRM_BIT. SIGPROF is excluded because we want to
+ * These are the asynchronous signals. SIGPROF is excluded because we want to
* be able to profile all of UML, not just the non-critical sections. If
* profiling is not thread-safe, then that is not my problem. We can disable
* profiling when SMP is enabled in that case.
@@ -27,9 +26,6 @@
#define SIGVTALRM_BIT 1
#define SIGVTALRM_MASK (1 << SIGVTALRM_BIT)
-#define SIGALRM_BIT 2
-#define SIGALRM_MASK (1 << SIGALRM_BIT)
-
/*
* These are used by both the signal handlers and
* block/unblock_signals. I don't want modifications cached in a
@@ -55,7 +51,7 @@ void sig_handler(int sig, struct sigcontext *sc)
set_signals(enabled);
}
-static void real_alarm_handler(int sig, struct sigcontext *sc)
+static void real_alarm_handler(struct sigcontext *sc)
{
struct uml_pt_regs regs;
@@ -63,7 +59,7 @@ static void real_alarm_handler(int sig, struct sigcontext *sc)
copy_sc(&regs, sc);
regs.is_user = 0;
unblock_signals();
- timer_handler(sig, &regs);
+ timer_handler(SIGVTALRM, &regs);
}
void alarm_handler(int sig, struct sigcontext *sc)
@@ -72,27 +68,20 @@ void alarm_handler(int sig, struct sigcontext *sc)
enabled = signals_enabled;
if (!signals_enabled) {
- if (sig == SIGVTALRM)
- pending |= SIGVTALRM_MASK;
- else pending |= SIGALRM_MASK;
-
+ pending |= SIGVTALRM_MASK;
return;
}
block_signals();
- real_alarm_handler(sig, sc);
+ real_alarm_handler(sc);
set_signals(enabled);
}
void timer_init(void)
{
set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
- SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
- SIGALRM, -1);
- set_handler(SIGALRM, (__sighandler_t) alarm_handler,
- SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
- SIGALRM, -1);
+ SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, -1);
}
void set_sigstack(void *sig_stack, int size)
@@ -267,11 +256,8 @@ void unblock_signals(void)
if (save_pending & SIGIO_MASK)
sig_handler_common_skas(SIGIO, NULL);
- if (save_pending & SIGALRM_MASK)
- real_alarm_handler(SIGALRM, NULL);
-
if (save_pending & SIGVTALRM_MASK)
- real_alarm_handler(SIGVTALRM, NULL);
+ real_alarm_handler(NULL);
}
}
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 3e64814e888e..9936531a2620 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -222,7 +222,6 @@ static int userspace_tramp(void *stack)
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sigaddset(&sa.sa_mask, SIGWINCH);
- sigaddset(&sa.sa_mask, SIGALRM);
sigaddset(&sa.sa_mask, SIGVTALRM);
sigaddset(&sa.sa_mask, SIGUSR1);
sa.sa_flags = SA_ONSTACK;
@@ -539,8 +538,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
int n;
set_handler(SIGWINCH, (__sighandler_t) sig_handler,
- SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM,
- SIGVTALRM, -1);
+ SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGVTALRM, -1);
/*
* Can't use UML_SETJMP or UML_LONGJMP here because they save
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
index e53face44200..3b1b9244f468 100644
--- a/arch/um/os-Linux/skas/trap.c
+++ b/arch/um/os-Linux/skas/trap.c
@@ -58,9 +58,8 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
handler = sig_info[sig];
- /* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
- if (sig != SIGIO && sig != SIGWINCH &&
- sig != SIGVTALRM && sig != SIGALRM)
+ /* unblock SIGVTALRM, SIGIO if sig isn't IRQ signal */
+ if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM))
unblock_signals();
handler(sig, r);
diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c
index d3a34ca8a891..2a1c9843e32e 100644
--- a/arch/um/os-Linux/trap.c
+++ b/arch/um/os-Linux/trap.c
@@ -20,5 +20,4 @@ void os_fill_handlinfo(struct kern_handlers h)
sig_info[SIGSEGV] = h.page_fault;
sig_info[SIGIO] = h.sigio_handler;
sig_info[SIGVTALRM] = h.timer_handler;
- sig_info[SIGALRM] = h.timer_handler;
}

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