[PATCH] mm: mm_init set_mm_counters

How is anon_rss initialized?  In dup_mmap, and by mm_alloc's memset; but
that's not so good if an mm_counter_t is a special type.  And how is rss
initialized?  By set_mm_counter, all over the place.  Come on, we just need to
initialize them both at once by set_mm_counter in mm_init (which follows the
memcpy when forking).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

9 files changed, 2 insertions, 16 deletions

diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c
index 99262fe..7ce34d4 100644
--- a/arch/mips/kernel/irixelf.c
+++ b/arch/mips/kernel/irixelf.c
@@ -697,7 +697,6 @@ static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	/* Do this so that we can load the interpreter, if need be.  We will
 	 * change some of these later.
 	 */
-	set_mm_counter(current->mm, rss, 0);
 	setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
 	current->mm->start_stack = bprm->p;
 
diff --git a/arch/sparc64/kernel/binfmt_aout32.c b/arch/sparc64/kernel/binfmt_aout32.c
index b2854ef..edf52d06 100644
--- a/arch/sparc64/kernel/binfmt_aout32.c
+++ b/arch/sparc64/kernel/binfmt_aout32.c
@@ -241,7 +241,6 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	current->mm->brk = ex.a_bss +
 		(current->mm->start_brk = N_BSSADDR(ex));
 
-	set_mm_counter(current->mm, rss, 0);
 	current->mm->mmap = NULL;
 	compute_creds(bprm);
  	current->flags &= ~PF_FORKNOEXEC;
diff --git a/arch/x86_64/ia32/ia32_aout.c b/arch/x86_64/ia32/ia32_aout.c
index 3e6780f..93c60f4 100644
--- a/arch/x86_64/ia32/ia32_aout.c
+++ b/arch/x86_64/ia32/ia32_aout.c
@@ -314,7 +314,6 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	current->mm->free_area_cache = TASK_UNMAPPED_BASE;
 	current->mm->cached_hole_size = 0;
 
-	set_mm_counter(current->mm, rss, 0);
 	current->mm->mmap = NULL;
 	compute_creds(bprm);
  	current->flags &= ~PF_FORKNOEXEC;
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index dd9baab..7201182 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -318,7 +318,6 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	current->mm->free_area_cache = current->mm->mmap_base;
 	current->mm->cached_hole_size = 0;
 
-	set_mm_counter(current->mm, rss, 0);
 	current->mm->mmap = NULL;
 	compute_creds(bprm);
  	current->flags &= ~PF_FORKNOEXEC;
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index d4b1557..918ccc2 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -773,7 +773,6 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 
 	/* Do this so that we can load the interpreter, if need be.  We will
 	   change some of these later */
-	set_mm_counter(current->mm, rss, 0);
 	current->mm->free_area_cache = current->mm->mmap_base;
 	current->mm->cached_hole_size = 0;
 	retval = setup_arg_pages(bprm, randomize_stack_top(STACK_TOP),
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 134c9c0..dda87c4 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -294,14 +294,7 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
 				  &interp_params,
 				  &current->mm->start_stack,
 				  &current->mm->start_brk);
-#endif
-
-	/* do this so that we can load the interpreter, if need be
-	 * - we will change some of these later
-	 */
-	set_mm_counter(current->mm, rss, 0);
 
-#ifdef CONFIG_MMU
 	retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack);
 	if (retval < 0) {
 		send_sig(SIGKILL, current, 0);
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 7974efa..9d66258 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -650,7 +650,6 @@ static int load_flat_file(struct linux_binprm * bprm,
 		current->mm->start_brk = datapos + data_len + bss_len;
 		current->mm->brk = (current->mm->start_brk + 3) & ~3;
 		current->mm->context.end_brk = memp + ksize((void *) memp) - stack_len;
-		set_mm_counter(current->mm, rss, 0);
 	}
 
 	if (flags & FLAT_FLAG_KTRACE)
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index 227a268..00a91dc 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -259,7 +259,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	create_som_tables(bprm);
 
 	current->mm->start_stack = bprm->p;
-	set_mm_counter(current->mm, rss, 0);
 
 #if 0
 	printk("(start_brk) %08lx\n" , (unsigned long) current->mm->start_brk);
diff --git a/kernel/fork.c b/kernel/fork.c
index e2ff11f..25caa02 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -198,8 +198,6 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm)
 	mm->free_area_cache = oldmm->mmap_base;
 	mm->cached_hole_size = ~0UL;
 	mm->map_count = 0;
-	set_mm_counter(mm, rss, 0);
-	set_mm_counter(mm, anon_rss, 0);
 	cpus_clear(mm->cpu_vm_mask);
 	mm->mm_rb = RB_ROOT;
 	rb_link = &mm->mm_rb.rb_node;
@@ -323,6 +321,8 @@ static struct mm_struct * mm_init(struct mm_struct * mm)
 	INIT_LIST_HEAD(&mm->mmlist);
 	mm->core_waiters = 0;
 	mm->nr_ptes = 0;
+	set_mm_counter(mm, rss, 0);
+	set_mm_counter(mm, anon_rss, 0);
 	spin_lock_init(&mm->page_table_lock);
 	rwlock_init(&mm->ioctx_list_lock);
 	mm->ioctx_list = NULL;