From: Derrick Brashear <shadow@dementia.org>
Date: Wed, 28 Aug 2002 05:30:48 +0000 (+0000)
Subject: STABLE12-linux-tasklist-lock-export-detection-20020829
X-Git-Tag: openafs-stable-1_2_7~21
X-Git-Url: https://git.michaelhowe.org/gitweb/?a=commitdiff_plain;h=9d623467959ced4137dae2d113103c7b9acf7e51;p=packages%2Fo%2Fopenafs.git

STABLE12-linux-tasklist-lock-export-detection-20020829


if you don't have a versioned kernel, so sorry.


(cherry picked from commit efd9a7e32dc793c45f056be5c796f25db429a054)
---

diff --git a/acconfig.h b/acconfig.h
index cba9aa44b..f97e3b1ab 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -34,6 +34,7 @@ static /**/const char *const rcsid[] = { (char *)rcsid, "\100(#)" msg }
 #undef STRUCT_INODE_HAS_I_TRUNCATE_SEM
 #undef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
 #undef STRUCT_INODE_HAS_I_DEVICES
+#undef EXPORTED_TASKLIST_LOCK
 #undef ssize_t
 
 /* glue for RedHat kernel bug */
diff --git a/acinclude.m4 b/acinclude.m4
index d1d7daf8e..f33e0377c 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -140,8 +140,12 @@ case $system in
 		 LINUX_FS_STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
 		 LINUX_FS_STRUCT_INODE_HAS_I_DEVICES
 	  	 LINUX_INODE_SETATTR_RETURN_TYPE
+		 LINUX_EXPORTS_TASKLIST_LOCK
 		 LINUX_NEED_RHCONFIG
 		 LINUX_WHICH_MODULES
+		 if test "x$ac_cv_linux_exports_tasklist_lock" = "xyes" ; then
+		  AC_DEFINE(EXPORTED_TASKLIST_LOCK)
+		 fi
 		 if test "x$ac_cv_linux_func_inode_setattr_returns_int" = "xyes" ; then
 		  AC_DEFINE(INODE_SETATTR_NOT_VOID)
 		 fi
diff --git a/src/afs/afs_osi.c b/src/afs/afs_osi.c
index 023be0926..6064c5425 100644
--- a/src/afs/afs_osi.c
+++ b/src/afs/afs_osi.c
@@ -780,13 +780,17 @@ void afs_osi_TraverseProcTable()
 {   
     struct task_struct *p;
 
+#ifdef EXPORTED_TASKLIST_LOCK
     read_lock(&tasklist_lock);
+#endif
     for_each_task(p) if (p->pid) {
         if (p->state & TASK_ZOMBIE)
             continue;
 	afs_GCPAGs_perproc_func(p);
     }
+#ifdef EXPORTED_TASKLIST_LOCK
     read_unlock(&tasklist_lock);
+#endif
 }   
 #endif