patch-2.3.11 linux/arch/i386/kernel/init_task.c

• Lines: 23
• Date: Mon Jul 19 15:23:49 1999
• Orig file: v2.3.10/linux/arch/i386/kernel/init_task.c
• Orig date: Tue May 11 14:37:40 1999

diff -u --recursive --new-file v2.3.10/linux/arch/i386/kernel/init_task.c linux/arch/i386/kernel/init_task.c
@@ -4,6 +4,7 @@
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/desc.h>
+#include <asm/init.h>
 
 static struct vm_area_struct init_mmap = INIT_MMAP;
 static struct fs_struct init_fs = INIT_FS;
@@ -22,4 +23,13 @@
 union task_union init_task_union 
 	__attribute__((__section__(".data.init_task"))) =
 		{ INIT_TASK(init_task_union.task) };
- 
+
+/*
+ * per-CPU TSS segments. Threads are completely 'soft' on Linux,
+ * no more per-task TSS's. The TSS size is kept cacheline-aligned
+ * so they are allowed to end up in the .data.cacheline_aligned
+ * section. Since TSS's are completely CPU-local, we want them
+ * on exact cacheline boundaries, to eliminate cacheline ping-pong.
+ */ 
+struct tss_struct init_tss[NR_CPUS] __cacheline_aligned = { [0 ... NR_CPUS-1] = INIT_TSS };
+