Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

Conflicts:
	drivers/firmware/iscsi_ibft.c

1 files changed, 120 insertions, 54 deletions

diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index e51168064e56..bd1c497280a6 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -39,10 +39,10 @@ static mempool_t *dwarf_frame_pool;
 static struct kmem_cache *dwarf_reg_cachep;
 static mempool_t *dwarf_reg_pool;
 
-static LIST_HEAD(dwarf_cie_list);
+static struct rb_root cie_root;
 static DEFINE_SPINLOCK(dwarf_cie_lock);
 
-static LIST_HEAD(dwarf_fde_list);
+static struct rb_root fde_root;
 static DEFINE_SPINLOCK(dwarf_fde_lock);
 
 static struct dwarf_cie *cached_cie;
@@ -301,7 +301,8 @@ static inline int dwarf_entry_len(char *addr, unsigned long *len)
  */
 static struct dwarf_cie *dwarf_lookup_cie(unsigned long cie_ptr)
 {
-	struct dwarf_cie *cie;
+	struct rb_node **rb_node = &cie_root.rb_node;
+	struct dwarf_cie *cie = NULL;
 	unsigned long flags;
 
 	spin_lock_irqsave(&dwarf_cie_lock, flags);
@@ -315,16 +316,24 @@ static struct dwarf_cie *dwarf_lookup_cie(unsigned long cie_ptr)
 		goto out;
 	}
 
-	list_for_each_entry(cie, &dwarf_cie_list, link) {
-		if (cie->cie_pointer == cie_ptr) {
-			cached_cie = cie;
-			break;
+	while (*rb_node) {
+		struct dwarf_cie *cie_tmp;
+
+		cie_tmp = rb_entry(*rb_node, struct dwarf_cie, node);
+		BUG_ON(!cie_tmp);
+
+		if (cie_ptr == cie_tmp->cie_pointer) {
+			cie = cie_tmp;
+			cached_cie = cie_tmp;
+			goto out;
+		} else {
+			if (cie_ptr < cie_tmp->cie_pointer)
+				rb_node = &(*rb_node)->rb_left;
+			else
+				rb_node = &(*rb_node)->rb_right;
 		}
 	}
 
-	/* Couldn't find the entry in the list. */
-	if (&cie->link == &dwarf_cie_list)
-		cie = NULL;
 out:
 	spin_unlock_irqrestore(&dwarf_cie_lock, flags);
 	return cie;
@@ -336,25 +345,34 @@ out:
  */
 struct dwarf_fde *dwarf_lookup_fde(unsigned long pc)
 {
-	struct dwarf_fde *fde;
+	struct rb_node **rb_node = &fde_root.rb_node;
+	struct dwarf_fde *fde = NULL;
 	unsigned long flags;
 
 	spin_lock_irqsave(&dwarf_fde_lock, flags);
 
-	list_for_each_entry(fde, &dwarf_fde_list, link) {
-		unsigned long start, end;
+	while (*rb_node) {
+		struct dwarf_fde *fde_tmp;
+		unsigned long tmp_start, tmp_end;
 
-		start = fde->initial_location;
-		end = fde->initial_location + fde->address_range;
+		fde_tmp = rb_entry(*rb_node, struct dwarf_fde, node);
+		BUG_ON(!fde_tmp);
 
-		if (pc >= start && pc < end)
-			break;
-	}
+		tmp_start = fde_tmp->initial_location;
+		tmp_end = fde_tmp->initial_location + fde_tmp->address_range;
 
-	/* Couldn't find the entry in the list. */
-	if (&fde->link == &dwarf_fde_list)
-		fde = NULL;
+		if (pc < tmp_start) {
+			rb_node = &(*rb_node)->rb_left;
+		} else {
+			if (pc < tmp_end) {
+				fde = fde_tmp;
+				goto out;
+			} else
+				rb_node = &(*rb_node)->rb_right;
+		}
+	}
 
+out:
 	spin_unlock_irqrestore(&dwarf_fde_lock, flags);
 
 	return fde;
@@ -552,8 +570,8 @@ extern void ret_from_irq(void);
  *	on the callstack. Each of the lower (older) stack frames are
  *	linked via the "prev" member.
  */
-struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
-					struct dwarf_frame *prev)
+struct dwarf_frame *dwarf_unwind_stack(unsigned long pc,
+				       struct dwarf_frame *prev)
 {
 	struct dwarf_frame *frame;
 	struct dwarf_cie *cie;
@@ -708,6 +726,8 @@ bail:
 static int dwarf_parse_cie(void *entry, void *p, unsigned long len,
 			   unsigned char *end, struct module *mod)
 {
+	struct rb_node **rb_node = &cie_root.rb_node;
+	struct rb_node *parent;
 	struct dwarf_cie *cie;
 	unsigned long flags;
 	int count;
@@ -802,11 +822,30 @@ static int dwarf_parse_cie(void *entry, void *p, unsigned long len,
 	cie->initial_instructions = p;
 	cie->instructions_end = end;
 
-	cie->mod = mod;
-
 	/* Add to list */
 	spin_lock_irqsave(&dwarf_cie_lock, flags);
-	list_add_tail(&cie->link, &dwarf_cie_list);
+
+	while (*rb_node) {
+		struct dwarf_cie *cie_tmp;
+
+		cie_tmp = rb_entry(*rb_node, struct dwarf_cie, node);
+
+		parent = *rb_node;
+
+		if (cie->cie_pointer < cie_tmp->cie_pointer)
+			rb_node = &parent->rb_left;
+		else if (cie->cie_pointer >= cie_tmp->cie_pointer)
+			rb_node = &parent->rb_right;
+		else
+			WARN_ON(1);
+	}
+
+	rb_link_node(&cie->node, parent, rb_node);
+	rb_insert_color(&cie->node, &cie_root);
+
+	if (mod != NULL)
+		list_add_tail(&cie->link, &mod->arch.cie_list);
+
 	spin_unlock_irqrestore(&dwarf_cie_lock, flags);
 
 	return 0;
@@ -816,6 +855,8 @@ static int dwarf_parse_fde(void *entry, u32 entry_type,
 			   void *start, unsigned long len,
 			   unsigned char *end, struct module *mod)
 {
+	struct rb_node **rb_node = &fde_root.rb_node;
+	struct rb_node *parent;
 	struct dwarf_fde *fde;
 	struct dwarf_cie *cie;
 	unsigned long flags;
@@ -863,11 +904,38 @@ static int dwarf_parse_fde(void *entry, u32 entry_type,
 	fde->instructions = p;
 	fde->end = end;
 
-	fde->mod = mod;
-
 	/* Add to list. */
 	spin_lock_irqsave(&dwarf_fde_lock, flags);
-	list_add_tail(&fde->link, &dwarf_fde_list);
+
+	while (*rb_node) {
+		struct dwarf_fde *fde_tmp;
+		unsigned long tmp_start, tmp_end;
+		unsigned long start, end;
+
+		fde_tmp = rb_entry(*rb_node, struct dwarf_fde, node);
+
+		start = fde->initial_location;
+		end = fde->initial_location + fde->address_range;
+
+		tmp_start = fde_tmp->initial_location;
+		tmp_end = fde_tmp->initial_location + fde_tmp->address_range;
+
+		parent = *rb_node;
+
+		if (start < tmp_start)
+			rb_node = &parent->rb_left;
+		else if (start >= tmp_end)
+			rb_node = &parent->rb_right;
+		else
+			WARN_ON(1);
+	}
+
+	rb_link_node(&fde->node, parent, rb_node);
+	rb_insert_color(&fde->node, &fde_root);
+
+	if (mod != NULL)
+		list_add_tail(&fde->link, &mod->arch.fde_list);
+
 	spin_unlock_irqrestore(&dwarf_fde_lock, flags);
 
 	return 0;
@@ -912,19 +980,29 @@ static struct unwinder dwarf_unwinder = {
 
 static void dwarf_unwinder_cleanup(void)
 {
-	struct dwarf_cie *cie, *cie_tmp;
-	struct dwarf_fde *fde, *fde_tmp;
+	struct rb_node **fde_rb_node = &fde_root.rb_node;
+	struct rb_node **cie_rb_node = &cie_root.rb_node;
 
 	/*
 	 * Deallocate all the memory allocated for the DWARF unwinder.
 	 * Traverse all the FDE/CIE lists and remove and free all the
 	 * memory associated with those data structures.
 	 */
-	list_for_each_entry_safe(cie, cie_tmp, &dwarf_cie_list, link)
-		kfree(cie);
+	while (*fde_rb_node) {
+		struct dwarf_fde *fde;
 
-	list_for_each_entry_safe(fde, fde_tmp, &dwarf_fde_list, link)
+		fde = rb_entry(*fde_rb_node, struct dwarf_fde, node);
+		rb_erase(*fde_rb_node, &fde_root);
 		kfree(fde);
+	}
+
+	while (*cie_rb_node) {
+		struct dwarf_cie *cie;
+
+		cie = rb_entry(*cie_rb_node, struct dwarf_cie, node);
+		rb_erase(*cie_rb_node, &cie_root);
+		kfree(cie);
+	}
 
 	kmem_cache_destroy(dwarf_reg_cachep);
 	kmem_cache_destroy(dwarf_frame_cachep);
@@ -1024,6 +1102,8 @@ int module_dwarf_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
 
 	/* Did we find the .eh_frame section? */
 	if (i != hdr->e_shnum) {
+		INIT_LIST_HEAD(&me->arch.cie_list);
+		INIT_LIST_HEAD(&me->arch.fde_list);
 		err = dwarf_parse_section((char *)start, (char *)end, me);
 		if (err) {
 			printk(KERN_WARNING "%s: failed to parse DWARF info\n",
@@ -1044,38 +1124,26 @@ int module_dwarf_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
  */
 void module_dwarf_cleanup(struct module *mod)
 {
-	struct dwarf_fde *fde;
-	struct dwarf_cie *cie;
+	struct dwarf_fde *fde, *ftmp;
+	struct dwarf_cie *cie, *ctmp;
 	unsigned long flags;
 
 	spin_lock_irqsave(&dwarf_cie_lock, flags);
 
-again_cie:
-	list_for_each_entry(cie, &dwarf_cie_list, link) {
-		if (cie->mod == mod)
-			break;
-	}
-
-	if (&cie->link != &dwarf_cie_list) {
+	list_for_each_entry_safe(cie, ctmp, &mod->arch.cie_list, link) {
 		list_del(&cie->link);
+		rb_erase(&cie->node, &cie_root);
 		kfree(cie);
-		goto again_cie;
 	}
 
 	spin_unlock_irqrestore(&dwarf_cie_lock, flags);
 
 	spin_lock_irqsave(&dwarf_fde_lock, flags);
 
-again_fde:
-	list_for_each_entry(fde, &dwarf_fde_list, link) {
-		if (fde->mod == mod)
-			break;
-	}
-
-	if (&fde->link != &dwarf_fde_list) {
+	list_for_each_entry_safe(fde, ftmp, &mod->arch.fde_list, link) {
 		list_del(&fde->link);
+		rb_erase(&fde->node, &fde_root);
 		kfree(fde);
-		goto again_fde;
 	}
 
 	spin_unlock_irqrestore(&dwarf_fde_lock, flags);
@@ -1094,8 +1162,6 @@ again_fde:
 static int __init dwarf_unwinder_init(void)
 {
 	int err;
-	INIT_LIST_HEAD(&dwarf_cie_list);
-	INIT_LIST_HEAD(&dwarf_fde_list);
 
 	dwarf_frame_cachep = kmem_cache_create("dwarf_frames",
 			sizeof(struct dwarf_frame), 0,