diff options
| author | Bodo Stroesser <bstroesser@fujitsu-siemens.com> | 2006-01-18 17:42:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-18 19:20:18 -0800 |
| commit | 12919aa6e015dd85170fc3b1a3e10a5dfd116c72 (patch) | |
| tree | 07072818e5155f55f7c9867d216725f1261ec009 /arch/um/kernel | |
| parent | ea1eae75eb596e0628dc5e01d32c78b1f6b257fb (diff) | |
[PATCH] uml: move LDT creation
s390 doesn't have a LDT. So MM_COPY_SEGMENTS will not be supported on s390.
The only user of MM_COPY_SEGMENTS is new_mm(), but that's no longer useful, as
arch/sys-i386/ldt.c defines init_new_ldt(), which is called immediately after
new_mm(). So we should copy host's LDT in init_new_ldt(), if /proc/mm is
available, to have this subarch specific call in subarch code.
Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/skas/include/skas.h | 2 | ||||
| -rw-r--r-- | arch/um/kernel/skas/mmu.c | 8 | ||||
| -rw-r--r-- | arch/um/kernel/skas/process_kern.c | 16 |
3 files changed, 5 insertions, 21 deletions
diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h index 01d489de3986..a7f7cd556f1f 100644 --- a/arch/um/kernel/skas/include/skas.h +++ b/arch/um/kernel/skas/include/skas.h @@ -33,7 +33,7 @@ extern int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, int r, int w, int x, int done, void **data); extern void user_signal(int sig, union uml_pt_regs *regs, int pid); -extern int new_mm(int from, unsigned long stack); +extern int new_mm(unsigned long stack); extern int start_userspace(unsigned long stub_stack); extern int copy_context_skas0(unsigned long stack, int pid); extern void get_skas_faultinfo(int pid, struct faultinfo * fi); diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 677871f1b37c..c5c9885a8297 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -78,7 +78,7 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) struct mmu_context_skas *from_mm = NULL; struct mmu_context_skas *to_mm = &mm->context.skas; unsigned long stack = 0; - int from_fd, ret = -ENOMEM; + int ret = -ENOMEM; if(skas_needs_stub){ stack = get_zeroed_page(GFP_KERNEL); @@ -108,11 +108,7 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) from_mm = ¤t->mm->context.skas; if(proc_mm){ - if(from_mm) - from_fd = from_mm->id.u.mm_fd; - else from_fd = -1; - - ret = new_mm(from_fd, stack); + ret = new_mm(stack); if(ret < 0){ printk("init_new_context_skas - new_mm failed, " "errno = %d\n", ret); diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c index dc41c6dc2f34..fcddee76c7c0 100644 --- a/arch/um/kernel/skas/process_kern.c +++ b/arch/um/kernel/skas/process_kern.c @@ -20,7 +20,6 @@ #include "tlb.h" #include "kern.h" #include "mode.h" -#include "proc_mm.h" #include "registers.h" void switch_to_skas(void *prev, void *next) @@ -125,25 +124,14 @@ int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp, extern void map_stub_pages(int fd, unsigned long code, unsigned long data, unsigned long stack); -int new_mm(int from, unsigned long stack) +int new_mm(unsigned long stack) { - struct proc_mm_op copy; - int n, fd; + int fd; fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); if(fd < 0) return(fd); - if(from != -1){ - copy = ((struct proc_mm_op) { .op = MM_COPY_SEGMENTS, - .u = - { .copy_segments = from } } ); - n = os_write_file(fd, ©, sizeof(copy)); - if(n != sizeof(copy)) - printk("new_mm : /proc/mm copy_segments failed, " - "err = %d\n", -n); - } - if(skas_needs_stub) map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); |