quota: Add lock annotations to struct members

[sfrench/cifs-2.6.git] / include / linux / random.h

diff --git a/include/linux/random.h b/include/linux/random.h
index 1fa0dc880bd7878e70200264e2486a579dfe1332..eafea6a09361f8787bad4aa22d906dc17177d03f 100644 (file)
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -34,6 +34,7 @@ extern void add_input_randomness(unsigned int type, unsigned int code,
 extern void add_interrupt_randomness(int irq, int irq_flags) __latent_entropy;
 
 extern void get_random_bytes(void *buf, int nbytes);
+extern int wait_for_random_bytes(void);
 extern int add_random_ready_callback(struct random_ready_callback *rdy);
 extern void del_random_ready_callback(struct random_ready_callback *rdy);
 extern void get_random_bytes_arch(void *buf, int nbytes);
@@ -78,6 +79,31 @@ static inline unsigned long get_random_canary(void)
        return val & CANARY_MASK;
 }
 
+/* Calls wait_for_random_bytes() and then calls get_random_bytes(buf, nbytes).
+ * Returns the result of the call to wait_for_random_bytes. */
+static inline int get_random_bytes_wait(void *buf, int nbytes)
+{
+       int ret = wait_for_random_bytes();
+       if (unlikely(ret))
+               return ret;
+       get_random_bytes(buf, nbytes);
+       return 0;
+}
+
+#define declare_get_random_var_wait(var) \
+       static inline int get_random_ ## var ## _wait(var *out) { \
+               int ret = wait_for_random_bytes(); \
+               if (unlikely(ret)) \
+                       return ret; \
+               *out = get_random_ ## var(); \
+               return 0; \
+       }
+declare_get_random_var_wait(u32)
+declare_get_random_var_wait(u64)
+declare_get_random_var_wait(int)
+declare_get_random_var_wait(long)
+#undef declare_get_random_var
+
 unsigned long randomize_page(unsigned long start, unsigned long range);
 
 u32 prandom_u32(void);