random: access primary_pool directly rather than through pointer

Both crng_initialize_primary() and crng_init_try_arch_early() are
only called for the primary_pool. Accessing it directly instead of
through a function parameter simplifies the code.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

diff --git a/drivers/char/random.c b/drivers/char/random.c
index c336c78..c49f9c5 100644 (file)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -762,7 +762,7 @@ static bool crng_init_try_arch(struct crng_state *crng)
        return arch_init;
 }
 
-static bool __init crng_init_try_arch_early(struct crng_state *crng)
+static bool __init crng_init_try_arch_early(void)
 {
        int i;
        bool arch_init = true;
@@ -774,7 +774,7 @@ static bool __init crng_init_try_arch_early(struct crng_state *crng)
                        rv = random_get_entropy();
                        arch_init = false;
                }
-               crng->state[i] ^= rv;
+               primary_crng.state[i] ^= rv;
        }
 
        return arch_init;
@@ -788,16 +788,16 @@ static void crng_initialize_secondary(struct crng_state *crng)
        crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
 }
 
-static void __init crng_initialize_primary(struct crng_state *crng)
+static void __init crng_initialize_primary(void)
 {
-       _extract_entropy(&crng->state[4], sizeof(u32) * 12);
-       if (crng_init_try_arch_early(crng) && trust_cpu && crng_init < 2) {
+       _extract_entropy(&primary_crng.state[4], sizeof(u32) * 12);
+       if (crng_init_try_arch_early() && trust_cpu && crng_init < 2) {
                invalidate_batched_entropy();
                numa_crng_init();
                crng_init = 2;
                pr_notice("crng init done (trusting CPU's manufacturer)\n");
        }
-       crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
+       primary_crng.init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
 }
 
 static void crng_finalize_init(struct crng_state *crng)
@@ -1698,7 +1698,7 @@ int __init rand_initialize(void)
        init_std_data();
        if (crng_need_final_init)
                crng_finalize_init(&primary_crng);
-       crng_initialize_primary(&primary_crng);
+       crng_initialize_primary();
        crng_global_init_time = jiffies;
        if (ratelimit_disable) {
                urandom_warning.interval = 0;