Merge branch 'akpm' (patches from Andrew)

[sfrench/cifs-2.6.git] / kernel / gcov / base.c

diff --git a/kernel/gcov/base.c b/kernel/gcov/base.c
index 0ffe9f1940807258e8bf3255613ea5077ca44410..073a3738c5e63b488022dea13e802c71992bd678 100644 (file)
--- a/kernel/gcov/base.c
+++ b/kernel/gcov/base.c
@@ -49,6 +49,55 @@ void gcov_enable_events(void)
        mutex_unlock(&gcov_lock);
 }
 
+/**
+ * store_gcov_u32 - store 32 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. Returns the number of bytes stored. If @buffer is %NULL, doesn't
+ * store anything.
+ */
+size_t store_gcov_u32(void *buffer, size_t off, u32 v)
+{
+       u32 *data;
+
+       if (buffer) {
+               data = buffer + off;
+               *data = v;
+       }
+
+       return sizeof(*data);
+}
+
+/**
+ * store_gcov_u64 - store 64 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. 64 bit numbers are stored as two 32 bit numbers, the low part
+ * first. Returns the number of bytes stored. If @buffer is %NULL, doesn't store
+ * anything.
+ */
+size_t store_gcov_u64(void *buffer, size_t off, u64 v)
+{
+       u32 *data;
+
+       if (buffer) {
+               data = buffer + off;
+
+               data[0] = (v & 0xffffffffUL);
+               data[1] = (v >> 32);
+       }
+
+       return sizeof(*data) * 2;
+}
+
 #ifdef CONFIG_MODULES
 /* Update list and generate events when modules are unloaded. */
 static int gcov_module_notifier(struct notifier_block *nb, unsigned long event,