X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-linux-os.c;h=15eb762787fd401ee1dd461c478dd2783e51d076;hb=eb5265ab22a2b1cae18bbdf43c871dba9b5927ea;hp=7d42968b5386e5454e9990e6c54175d712f2a80d;hpb=8822fdb9fd379c88833e8122b6f647201c2a6798;p=sbcl.git

diff --git a/src/runtime/x86-linux-os.c b/src/runtime/x86-linux-os.c
index 7d42968..15eb762 100644
--- a/src/runtime/x86-linux-os.c
+++ b/src/runtime/x86-linux-os.c
@@ -22,6 +22,7 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "sbcl.h"
 #include "./signal.h"
 #include "os.h"
 #include "arch.h"
@@ -29,7 +30,6 @@
 #include "interrupt.h"
 #include "interr.h"
 #include "lispregs.h"
-#include "sbcl.h"
 #include <sys/socket.h>
 #include <sys/utsname.h>
 
@@ -42,8 +42,13 @@
 #include <asm/ldt.h>
 #include <linux/unistd.h>
 #include <sys/mman.h>
+#include <linux/version.h>
 #include "thread.h"		/* dynamic_values_bytes */
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+#define user_desc  modify_ldt_ldt_s 
+#endif
+
 _syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount );
 
 #include "validate.h"
@@ -60,15 +65,15 @@ void debug_get_ldt()
     printf("%d bytes in ldt: print/x local_ldt_copy\n", n);
 }
 
-lispobj modify_ldt_lock;	/* protect all calls to modify_ldt */
+volatile lispobj modify_ldt_lock;	/* protect all calls to modify_ldt */
 
 int arch_os_thread_init(struct thread *thread) {
     stack_t sigstack;
 #ifdef LISP_FEATURE_SB_THREAD
-    /* this must be called from a function that has an exclusive lock
-     * on all_threads
+    /* FIXME Lock ordering rules: all_threads_lock must usually be
+     * held when getting modify_ldt_lock
      */
-    struct modify_ldt_ldt_s ldt_entry = {
+    struct user_desc ldt_entry = {
 	1, 0, 0, /* index, address, length filled in later */
 	1, MODIFY_LDT_CONTENTS_DATA, 0, 0, 0, 1
     }; 
@@ -123,7 +128,7 @@ struct thread *debug_get_fs() {
  */
 
 int arch_os_thread_cleanup(struct thread *thread) {
-    struct modify_ldt_ldt_s ldt_entry = {
+    struct user_desc ldt_entry = {
 	0, 0, 0, 
 	0, MODIFY_LDT_CONTENTS_DATA, 0, 0, 0, 0
     };