1 files changed, 7 insertions, 23 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 482531d87fb8..92d6dd24c86e 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -466,7 +466,6 @@ struct entropy_store {
         int entropy_count;
         int entropy_total;
         unsigned int initialized:1;
-        unsigned int limit:1;
         unsigned int last_data_init:1;
         __u8 last_data[EXTRACT_SIZE];
 };
@@ -484,7 +483,6 @@ static __u32 blocking_pool_data[OUTPUT_POOL_WORDS] __latent_entropy;
 static struct entropy_store input_pool = {
         .poolinfo = &poolinfo_table[0],
         .name = "input",
-        .limit = 1,
         .lock = __SPIN_LOCK_UNLOCKED(input_pool.lock),
         .pool = input_pool_data
 };
@@ -492,7 +490,6 @@ static struct entropy_store input_pool = {
 static struct entropy_store blocking_pool = {
         .poolinfo = &poolinfo_table[1],
         .name = "blocking",
-        .limit = 1,
         .pull = &input_pool,
         .lock = __SPIN_LOCK_UNLOCKED(blocking_pool.lock),
         .pool = blocking_pool_data,
@@ -1212,15 +1209,6 @@ static void xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
             r->entropy_count > r->poolinfo->poolfracbits)
                 return;
 
-        if (r->limit == 0 && random_min_urandom_seed) {
-                unsigned long now = jiffies;
-
-                if (time_before(now,
-                                r->last_pulled + random_min_urandom_seed * HZ))
-                        return;
-                r->last_pulled = now;
-        }
-
         _xfer_secondary_pool(r, nbytes);
 }
 
@@ -1228,8 +1216,6 @@ static void _xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
 {
         __u32   tmp[OUTPUT_POOL_WORDS];
 
-        /* For /dev/random's pool, always leave two wakeups' worth */
-        int rsvd_bytes = r->limit ? 0 : random_read_wakeup_bits / 4;
         int bytes = nbytes;
 
         /* pull at least as much as a wakeup */
@@ -1240,7 +1226,7 @@ static void _xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
         trace_xfer_secondary_pool(r->name, bytes * 8, nbytes * 8,
                                   ENTROPY_BITS(r), ENTROPY_BITS(r->pull));
         bytes = extract_entropy(r->pull, tmp, bytes,
-                                random_read_wakeup_bits / 8, rsvd_bytes);
+                                random_read_wakeup_bits / 8, 0);
         mix_pool_bytes(r, tmp, bytes);
         credit_entropy_bits(r, bytes*8);
 }
@@ -1268,7 +1254,7 @@ static void push_to_pool(struct work_struct *work)
 static size_t account(struct entropy_store *r, size_t nbytes, int min,
                       int reserved)
 {
-        int entropy_count, orig;
+        int entropy_count, orig, have_bytes;
         size_t ibytes, nfrac;
 
         BUG_ON(r->entropy_count > r->poolinfo->poolfracbits);
@@ -1277,14 +1263,12 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,
 retry:
         entropy_count = orig = ACCESS_ONCE(r->entropy_count);
         ibytes = nbytes;
-        /* If limited, never pull more than available */
-        if (r->limit) {
-                int have_bytes = entropy_count >> (ENTROPY_SHIFT + 3);
+        /* never pull more than available */
+        have_bytes = entropy_count >> (ENTROPY_SHIFT + 3);
 
-                if ((have_bytes -= reserved) < 0)
-                        have_bytes = 0;
-                ibytes = min_t(size_t, ibytes, have_bytes);
-        }
+        if ((have_bytes -= reserved) < 0)
+                have_bytes = 0;
+        ibytes = min_t(size_t, ibytes, have_bytes);
         if (ibytes < min)
                 ibytes = 0;