Date: Thu, 12 Mar 2009 10:40:07 GMT From: Bruce Simpson <bms@incunabulum.net> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/127545: [sysvipc] POSIX (1003.1b) semaphores can become negative Message-ID: <200903121040.n2CAe7SA029215@freefall.freebsd.org>
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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
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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;
--------------070200030208040807070007--
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