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Date: Thu, 12 Mar 2009 10:40:07 GMT
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To: freebsd-bugs@FreeBSD.org
From: Bruce Simpson <bms@incunabulum.net>
Cc: 
Subject: Re: kern/127545: [sysvipc] POSIX (1003.1b) semaphores can become
 negative
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The following reply was made to PR kern/127545; it has been noted by GNATS.

From: Bruce Simpson <bms@incunabulum.net>
To: freebsd-gnats-submit@freebsd.org, 
 Philip Semanchuk <philip@semanchuk.com>
Cc:  
Subject: Re: kern/127545: [sysvipc] POSIX (1003.1b) semaphores can become
 negative
Date: Thu, 12 Mar 2009 10:38:38 +0000

 This is a multi-part message in MIME format.
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 Can you please try this patch?
 
 thanks,
 BMS
 
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 Index: uipc_sem.c
 ===================================================================
 --- uipc_sem.c	(revision 189736)
 +++ uipc_sem.c	(working copy)
 @@ -722,7 +722,7 @@
  #endif
  	DP(("kern_sem_wait value = %d, tryflag %d\n", ks->ks_value, tryflag));
  	vfs_timestamp(&ks->ks_atime);
 -	if (ks->ks_value == 0) {
 +	while (ks->ks_value == 0) {
  		ks->ks_waiters++;
  		if (tryflag != 0)
  			error = EAGAIN;
 
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