drbd: The kernel code is now equivalent to out of tree release 8.3.7

[safe/jmp/linux-2.6] / include / linux / threads.h

diff --git a/include/linux/threads.h b/include/linux/threads.h
index b59738a..052b12b 100644 (file)
--- a/include/linux/threads.h
+++ b/include/linux/threads.h
@@ -1,7 +1,6 @@
 #ifndef _LINUX_THREADS_H
 #define _LINUX_THREADS_H
 
-#include <linux/config.h>
 
 /*
  * The default limit for the nr of threads is now in
@@ -9,17 +8,17 @@
  */
 
 /*
- * Maximum supported processors that can run under SMP.  This value is
- * set via configure setting.  The maximum is equal to the size of the
- * bitmasks used on that platform, i.e. 32 or 64.  Setting this smaller
- * saves quite a bit of memory.
+ * Maximum supported processors.  Setting this smaller saves quite a
+ * bit of memory.  Use nr_cpu_ids instead of this except for static bitmaps.
  */
-#ifdef CONFIG_SMP
-#define NR_CPUS                CONFIG_NR_CPUS
-#else
-#define NR_CPUS                1
+#ifndef CONFIG_NR_CPUS
+/* FIXME: This should be fixed in the arch's Kconfig */
+#define CONFIG_NR_CPUS 1
 #endif
 
+/* Places which use this should consider cpumask_var_t. */
+#define NR_CPUS                CONFIG_NR_CPUS
+
 #define MIN_THREADS_LEFT_FOR_ROOT 4
 
 /*
@@ -28,7 +27,8 @@
 #define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
 
 /*
- * A maximum of 4 million PIDs should be enough for a while:
+ * A maximum of 4 million PIDs should be enough for a while.
+ * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.]
  */
 #define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
        (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))