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uml: eliminate SIGALRM

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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>
This commit is contained in:
Jeff Dike
2007-10-16 01:27:27 -07:00
committed by Linus Torvalds
parent 5f734614fc
commit 61b63c556c
7 changed files with 17 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
arch/um/os-Linux/signal.c
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@ -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);
}
}