Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 37 insertions, 39 deletions

diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 23423bd00b0..67823de68db 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -33,45 +33,33 @@ struct phram_mtd_list {
 
 static LIST_HEAD(phram_list);
 
-
 static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
 {
 	u_char *start = mtd->priv;
 
-	if (instr->addr + instr->len > mtd->size)
-		return -EINVAL;
-
 	memset(start + instr->addr, 0xff, instr->len);
 
-	/* This'll catch a few races. Free the thing before returning :)
+	/*
+	 * This'll catch a few races. Free the thing before returning :)
 	 * I don't feel at all ashamed. This kind of thing is possible anyway
 	 * with flash, but unlikely.
 	 */
-
 	instr->state = MTD_ERASE_DONE;
-
 	mtd_erase_callback(instr);
-
 	return 0;
 }
 
 static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
 		size_t *retlen, void **virt, resource_size_t *phys)
 {
-	if (from + len > mtd->size)
-		return -EINVAL;
-
-	/* can we return a physical address with this driver? */
-	if (phys)
-		return -EINVAL;
-
 	*virt = mtd->priv + from;
 	*retlen = len;
 	return 0;
 }
 
-static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static int phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
 {
+	return 0;
 }
 
 static int phram_read(struct mtd_info *mtd, loff_t from, size_t len,
@@ -79,14 +67,7 @@ static int phram_read(struct mtd_info *mtd, loff_t from, size_t len,
 {
 	u_char *start = mtd->priv;
 
-	if (from >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - from)
-		len = mtd->size - from;
-
 	memcpy(buf, start + from, len);
-
 	*retlen = len;
 	return 0;
 }
@@ -96,20 +77,11 @@ static int phram_write(struct mtd_info *mtd, loff_t to, size_t len,
 {
 	u_char *start = mtd->priv;
 
-	if (to >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - to)
-		len = mtd->size - to;
-
 	memcpy(start + to, buf, len);
-
 	*retlen = len;
 	return 0;
 }
 
-
-
 static void unregister_devices(void)
 {
 	struct phram_mtd_list *this, *safe;
@@ -142,11 +114,11 @@ static int register_device(char *name, unsigned long start, unsigned long len)
 	new->mtd.name = name;
 	new->mtd.size = len;
 	new->mtd.flags = MTD_CAP_RAM;
-        new->mtd.erase = phram_erase;
-	new->mtd.point = phram_point;
-	new->mtd.unpoint = phram_unpoint;
-	new->mtd.read = phram_read;
-	new->mtd.write = phram_write;
+	new->mtd._erase = phram_erase;
+	new->mtd._point = phram_point;
+	new->mtd._unpoint = phram_unpoint;
+	new->mtd._read = phram_read;
+	new->mtd._write = phram_write;
 	new->mtd.owner = THIS_MODULE;
 	new->mtd.type = MTD_RAM;
 	new->mtd.erasesize = PAGE_SIZE;
@@ -233,7 +205,17 @@ static inline void kill_final_newline(char *str)
 	return 1;		\
 } while (0)
 
-static int phram_setup(const char *val, struct kernel_param *kp)
+/*
+ * This shall contain the module parameter if any. It is of the form:
+ * - phram=<device>,<address>,<size> for module case
+ * - phram.phram=<device>,<address>,<size> for built-in case
+ * We leave 64 bytes for the device name, 12 for the address and 12 for the
+ * size.
+ * Example: phram.phram=rootfs,0xa0000000,512Mi
+ */
+static __initdata char phram_paramline[64+12+12];
+
+static int __init phram_setup(const char *val)
 {
 	char buf[64+12+12], *str = buf;
 	char *token[3];
@@ -282,12 +264,28 @@ static int phram_setup(const char *val, struct kernel_param *kp)
 	return ret;
 }
 
-module_param_call(phram, phram_setup, NULL, NULL, 000);
+static int __init phram_param_call(const char *val, struct kernel_param *kp)
+{
+	/*
+	 * This function is always called before 'init_phram()', whether
+	 * built-in or module.
+	 */
+	if (strlen(val) >= sizeof(phram_paramline))
+		return -ENOSPC;
+	strcpy(phram_paramline, val);
+
+	return 0;
+}
+
+module_param_call(phram, phram_param_call, NULL, NULL, 000);
 MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\"");
 
 
 static int __init init_phram(void)
 {
+	if (phram_paramline[0])
+		return phram_setup(phram_paramline);
+
 	return 0;
 }