From 42fda66387daa53538ae13a2c858396aaf037158 Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Tue, 16 Oct 2007 01:26:50 -0700 Subject: uml: throw out CONFIG_MODE_TT This patchset throws out tt mode, which has been non-functional for a while. This is done in phases, interspersed with code cleanups on the affected files. The removal is done as follows: remove all code, config options, and files which depend on CONFIG_MODE_TT get rid of the CHOOSE_MODE macro, which decided whether to call tt-mode or skas-mode code, and replace invocations with their skas portions replace all now-trivial procedures with their skas equivalents There are now a bunch of now-redundant pieces of data structures, including mode-specific pieces of the thread structure, pt_regs, and mm_context. These are all replaced with their skas-specific contents. As part of the ongoing style compliance project, I made a style pass over all files that were changed. There are three such patches, one for each phase, covering the files affected by that phase but no later ones. I noticed that we weren't freeing the LDT state associated with a process when it exited, so that's fixed in one of the later patches. The last patch is a tidying patch which I've had for a while, but which caused inexplicable crashes under tt mode. Since that is no longer a problem, this can now go in. This patch: Start getting rid of tt mode support. This patch throws out CONFIG_MODE_TT and all config options, code, and files which depend on it. CONFIG_MODE_SKAS is gone and everything that depends on it is included unconditionally. The few changed lines are in re-written Kconfig help, lines which needed something skas-related removed from them, and a few more which weren't strictly deletions. Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/sys-i386/tls.c | 16 ---------------- 1 file changed, 16 deletions(-) (limited to 'arch/um/sys-i386/tls.c') diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c index fea8e5e15cc..0340b96d101 100644 --- a/arch/um/sys-i386/tls.c +++ b/arch/um/sys-i386/tls.c @@ -18,10 +18,7 @@ #include "mode_kern.h" #include "os.h" #include "mode.h" - -#ifdef CONFIG_MODE_SKAS #include "skas.h" -#endif /* * If needed we can detect when it's uninitialized. @@ -31,7 +28,6 @@ static int host_supports_tls = -1; int host_gdt_entry_tls_min; -#ifdef CONFIG_MODE_SKAS int do_set_thread_area_skas(struct user_desc *info) { int ret; @@ -53,7 +49,6 @@ int do_get_thread_area_skas(struct user_desc *info) put_cpu(); return ret; } -#endif /* * sys_get_thread_area: get a yet unused TLS descriptor index. @@ -187,17 +182,6 @@ int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to) return 0; } -int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to) -{ - if (!host_supports_tls) - return 0; - - if (needs_TLS_update(to)) - return load_TLS(0, to); - - return 0; -} - static int set_tls_entry(struct task_struct* task, struct user_desc *info, int idx, int flushed) { -- cgit v1.2.3