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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-02-28 19:59:19 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-28 23:53:44 -0500
commit0551fbd29e16fccd46e41b7d01bf0f8f39b14212 (patch)
tree760783df743eec940d6f6cb848498580ddde03d8 /include/linux/sched.h
parentf61388822a6040ff462c5f7260daa0f1017f2db0 (diff)
[PATCH] Add mm->task_size and fix powerpc vdso
This patch adds mm->task_size to keep track of the task size of a given mm and uses that to fix the powerpc vdso so that it uses the mm task size to decide what pages to fault in instead of the current thread flags (which broke when ptracing). (akpm: I expect that mm_struct.task_size will become the way in which we finally sort out the confusion between 32-bit processes and 32-bit mm's. It may need tweaks, but at this stage this patch is powerpc-only.) Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b6f51e3a38ec..ff2e09c953b9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -298,8 +298,9 @@ struct mm_struct {
298 unsigned long addr, unsigned long len, 298 unsigned long addr, unsigned long len,
299 unsigned long pgoff, unsigned long flags); 299 unsigned long pgoff, unsigned long flags);
300 void (*unmap_area) (struct mm_struct *mm, unsigned long addr); 300 void (*unmap_area) (struct mm_struct *mm, unsigned long addr);
301 unsigned long mmap_base; /* base of mmap area */ 301 unsigned long mmap_base; /* base of mmap area */
302 unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */ 302 unsigned long task_size; /* size of task vm space */
303 unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
303 unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */ 304 unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
304 pgd_t * pgd; 305 pgd_t * pgd;
305 atomic_t mm_users; /* How many users with user space? */ 306 atomic_t mm_users; /* How many users with user space? */