Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 69 insertions, 54 deletions

diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index 91bec3ebdc8f..49629c71c9e7 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -14,13 +14,6 @@
 #include <linux/syscore_ops.h>
 #include "clk.h"
 
-static DEFINE_SPINLOCK(lock);
-static struct clk **clk_table;
-static void __iomem *reg_base;
-#ifdef CONFIG_OF
-static struct clk_onecell_data clk_data;
-#endif
-
 void samsung_clk_save(void __iomem *base,
 				    struct samsung_clk_reg_dump *rd,
 				    unsigned int num_regs)
@@ -55,40 +48,58 @@ struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
 }
 
 /* setup the essentials required to support clock lookup using ccf */
-void __init samsung_clk_init(struct device_node *np, void __iomem *base,
-			     unsigned long nr_clks)
+struct samsung_clk_provider *__init samsung_clk_init(struct device_node *np,
+			void __iomem *base, unsigned long nr_clks)
 {
-	reg_base = base;
+	struct samsung_clk_provider *ctx;
+	struct clk **clk_table;
+	int ret;
+	int i;
 
-	clk_table = kzalloc(sizeof(struct clk *) * nr_clks, GFP_KERNEL);
+	ctx = kzalloc(sizeof(struct samsung_clk_provider), GFP_KERNEL);
+	if (!ctx)
+		panic("could not allocate clock provider context.\n");
+
+	clk_table = kcalloc(nr_clks, sizeof(struct clk *), GFP_KERNEL);
 	if (!clk_table)
 		panic("could not allocate clock lookup table\n");
 
+	for (i = 0; i < nr_clks; ++i)
+		clk_table[i] = ERR_PTR(-ENOENT);
+
+	ctx->reg_base = base;
+	ctx->clk_data.clks = clk_table;
+	ctx->clk_data.clk_num = nr_clks;
+	spin_lock_init(&ctx->lock);
+
 	if (!np)
-		return;
+		return ctx;
 
-#ifdef CONFIG_OF
-	clk_data.clks = clk_table;
-	clk_data.clk_num = nr_clks;
-	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
-#endif
+	ret = of_clk_add_provider(np, of_clk_src_onecell_get,
+			&ctx->clk_data);
+	if (ret)
+		panic("could not register clock provide\n");
+
+	return ctx;
 }
 
 /* add a clock instance to the clock lookup table used for dt based lookup */
-void samsung_clk_add_lookup(struct clk *clk, unsigned int id)
+void samsung_clk_add_lookup(struct samsung_clk_provider *ctx, struct clk *clk,
+				unsigned int id)
 {
-	if (clk_table && id)
-		clk_table[id] = clk;
+	if (ctx->clk_data.clks && id)
+		ctx->clk_data.clks[id] = clk;
 }
 
 /* register a list of aliases */
-void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
-					unsigned int nr_clk)
+void __init samsung_clk_register_alias(struct samsung_clk_provider *ctx,
+				struct samsung_clock_alias *list,
+				unsigned int nr_clk)
 {
 	struct clk *clk;
 	unsigned int idx, ret;
 
-	if (!clk_table) {
+	if (!ctx->clk_data.clks) {
 		pr_err("%s: clock table missing\n", __func__);
 		return;
 	}
@@ -100,7 +111,7 @@ void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
 			continue;
 		}
 
-		clk = clk_table[list->id];
+		clk = ctx->clk_data.clks[list->id];
 		if (!clk) {
 			pr_err("%s: failed to find clock %d\n", __func__,
 				list->id);
@@ -115,7 +126,7 @@ void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
 }
 
 /* register a list of fixed clocks */
-void __init samsung_clk_register_fixed_rate(
+void __init samsung_clk_register_fixed_rate(struct samsung_clk_provider *ctx,
 		struct samsung_fixed_rate_clock *list, unsigned int nr_clk)
 {
 	struct clk *clk;
@@ -130,7 +141,7 @@ void __init samsung_clk_register_fixed_rate(
 			continue;
 		}
 
-		samsung_clk_add_lookup(clk, list->id);
+		samsung_clk_add_lookup(ctx, clk, list->id);
 
 		/*
 		 * Unconditionally add a clock lookup for the fixed rate clocks.
@@ -144,7 +155,7 @@ void __init samsung_clk_register_fixed_rate(
 }
 
 /* register a list of fixed factor clocks */
-void __init samsung_clk_register_fixed_factor(
+void __init samsung_clk_register_fixed_factor(struct samsung_clk_provider *ctx,
 		struct samsung_fixed_factor_clock *list, unsigned int nr_clk)
 {
 	struct clk *clk;
@@ -159,28 +170,30 @@ void __init samsung_clk_register_fixed_factor(
 			continue;
 		}
 
-		samsung_clk_add_lookup(clk, list->id);
+		samsung_clk_add_lookup(ctx, clk, list->id);
 	}
 }
 
 /* register a list of mux clocks */
-void __init samsung_clk_register_mux(struct samsung_mux_clock *list,
-					unsigned int nr_clk)
+void __init samsung_clk_register_mux(struct samsung_clk_provider *ctx,
+				struct samsung_mux_clock *list,
+				unsigned int nr_clk)
 {
 	struct clk *clk;
 	unsigned int idx, ret;
 
 	for (idx = 0; idx < nr_clk; idx++, list++) {
 		clk = clk_register_mux(NULL, list->name, list->parent_names,
-			list->num_parents, list->flags, reg_base + list->offset,
-			list->shift, list->width, list->mux_flags, &lock);
+			list->num_parents, list->flags,
+			ctx->reg_base + list->offset,
+			list->shift, list->width, list->mux_flags, &ctx->lock);
 		if (IS_ERR(clk)) {
 			pr_err("%s: failed to register clock %s\n", __func__,
 				list->name);
 			continue;
 		}
 
-		samsung_clk_add_lookup(clk, list->id);
+		samsung_clk_add_lookup(ctx, clk, list->id);
 
 		/* register a clock lookup only if a clock alias is specified */
 		if (list->alias) {
@@ -194,8 +207,9 @@ void __init samsung_clk_register_mux(struct samsung_mux_clock *list,
 }
 
 /* register a list of div clocks */
-void __init samsung_clk_register_div(struct samsung_div_clock *list,
-					unsigned int nr_clk)
+void __init samsung_clk_register_div(struct samsung_clk_provider *ctx,
+				struct samsung_div_clock *list,
+				unsigned int nr_clk)
 {
 	struct clk *clk;
 	unsigned int idx, ret;
@@ -203,22 +217,22 @@ void __init samsung_clk_register_div(struct samsung_div_clock *list,
 	for (idx = 0; idx < nr_clk; idx++, list++) {
 		if (list->table)
 			clk = clk_register_divider_table(NULL, list->name,
-					list->parent_name, list->flags,
-					reg_base + list->offset, list->shift,
-					list->width, list->div_flags,
-					list->table, &lock);
+				list->parent_name, list->flags,
+				ctx->reg_base + list->offset,
+				list->shift, list->width, list->div_flags,
+				list->table, &ctx->lock);
 		else
 			clk = clk_register_divider(NULL, list->name,
-					list->parent_name, list->flags,
-					reg_base + list->offset, list->shift,
-					list->width, list->div_flags, &lock);
+				list->parent_name, list->flags,
+				ctx->reg_base + list->offset, list->shift,
+				list->width, list->div_flags, &ctx->lock);
 		if (IS_ERR(clk)) {
 			pr_err("%s: failed to register clock %s\n", __func__,
 				list->name);
 			continue;
 		}
 
-		samsung_clk_add_lookup(clk, list->id);
+		samsung_clk_add_lookup(ctx, clk, list->id);
 
 		/* register a clock lookup only if a clock alias is specified */
 		if (list->alias) {
@@ -232,16 +246,17 @@ void __init samsung_clk_register_div(struct samsung_div_clock *list,
 }
 
 /* register a list of gate clocks */
-void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
-						unsigned int nr_clk)
+void __init samsung_clk_register_gate(struct samsung_clk_provider *ctx,
+				struct samsung_gate_clock *list,
+				unsigned int nr_clk)
 {
 	struct clk *clk;
 	unsigned int idx, ret;
 
 	for (idx = 0; idx < nr_clk; idx++, list++) {
 		clk = clk_register_gate(NULL, list->name, list->parent_name,
-				list->flags, reg_base + list->offset,
-				list->bit_idx, list->gate_flags, &lock);
+				list->flags, ctx->reg_base + list->offset,
+				list->bit_idx, list->gate_flags, &ctx->lock);
 		if (IS_ERR(clk)) {
 			pr_err("%s: failed to register clock %s\n", __func__,
 				list->name);
@@ -257,7 +272,7 @@ void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
 					__func__, list->alias);
 		}
 
-		samsung_clk_add_lookup(clk, list->id);
+		samsung_clk_add_lookup(ctx, clk, list->id);
 	}
 }
 
@@ -266,21 +281,21 @@ void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
  * tree and register it
  */
 #ifdef CONFIG_OF
-void __init samsung_clk_of_register_fixed_ext(
+void __init samsung_clk_of_register_fixed_ext(struct samsung_clk_provider *ctx,
 			struct samsung_fixed_rate_clock *fixed_rate_clk,
 			unsigned int nr_fixed_rate_clk,
 			struct of_device_id *clk_matches)
 {
 	const struct of_device_id *match;
-	struct device_node *np;
+	struct device_node *clk_np;
 	u32 freq;
 
-	for_each_matching_node_and_match(np, clk_matches, &match) {
-		if (of_property_read_u32(np, "clock-frequency", &freq))
+	for_each_matching_node_and_match(clk_np, clk_matches, &match) {
+		if (of_property_read_u32(clk_np, "clock-frequency", &freq))
 			continue;
-		fixed_rate_clk[(u32)match->data].fixed_rate = freq;
+		fixed_rate_clk[(unsigned long)match->data].fixed_rate = freq;
 	}
-	samsung_clk_register_fixed_rate(fixed_rate_clk, nr_fixed_rate_clk);
+	samsung_clk_register_fixed_rate(ctx, fixed_rate_clk, nr_fixed_rate_clk);
 }
 #endif