From: Greg Kroah-Hartman Date: Tue, 7 Jun 2022 09:17:00 +0000 (+0200) Subject: 5.10-stable patches X-Git-Tag: v5.10.121~49 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a6e1f2c0d2cb82b2cfc8085e87cc82f145815920;p=thirdparty%2Fkernel%2Fstable-queue.git 5.10-stable patches added patches: revert-random-use-static-branch-for-crng_ready.patch --- diff --git a/queue-5.10/revert-random-use-static-branch-for-crng_ready.patch b/queue-5.10/revert-random-use-static-branch-for-crng_ready.patch new file mode 100644 index 00000000000..c944a5290f3 --- /dev/null +++ b/queue-5.10/revert-random-use-static-branch-for-crng_ready.patch @@ -0,0 +1,68 @@ +From Jason@zx2c4.com Tue Jun 7 11:12:02 2022 +From: "Jason A. Donenfeld" +Date: Tue, 7 Jun 2022 10:40:05 +0200 +Subject: Revert "random: use static branch for crng_ready()" +To: stable@vger.kernel.org, gregkh@linuxfoundation.org +Cc: "Jason A. Donenfeld" +Message-ID: <20220607084005.666059-1-Jason@zx2c4.com> + +From: "Jason A. Donenfeld" + +This reverts upstream commit f5bda35fba615ace70a656d4700423fa6c9bebee +from stable. It's not essential and will take some time during 5.19 to +work out properly. + +Signed-off-by: Jason A. Donenfeld +--- + drivers/char/random.c | 12 ++---------- + 1 file changed, 2 insertions(+), 10 deletions(-) + +--- a/drivers/char/random.c ++++ b/drivers/char/random.c +@@ -79,8 +79,7 @@ static enum { + CRNG_EARLY = 1, /* At least POOL_EARLY_BITS collected */ + CRNG_READY = 2 /* Fully initialized with POOL_READY_BITS collected */ + } crng_init __read_mostly = CRNG_EMPTY; +-static DEFINE_STATIC_KEY_FALSE(crng_is_ready); +-#define crng_ready() (static_branch_likely(&crng_is_ready) || crng_init >= CRNG_READY) ++#define crng_ready() (likely(crng_init >= CRNG_READY)) + /* Various types of waiters for crng_init->CRNG_READY transition. */ + static DECLARE_WAIT_QUEUE_HEAD(crng_init_wait); + static struct fasync_struct *fasync; +@@ -110,11 +109,6 @@ bool rng_is_initialized(void) + } + EXPORT_SYMBOL(rng_is_initialized); + +-static void __cold crng_set_ready(struct work_struct *work) +-{ +- static_branch_enable(&crng_is_ready); +-} +- + /* Used by wait_for_random_bytes(), and considered an entropy collector, below. */ + static void try_to_generate_entropy(void); + +@@ -268,7 +262,7 @@ static void crng_reseed(void) + ++next_gen; + WRITE_ONCE(base_crng.generation, next_gen); + WRITE_ONCE(base_crng.birth, jiffies); +- if (!static_branch_likely(&crng_is_ready)) ++ if (!crng_ready()) + crng_init = CRNG_READY; + spin_unlock_irqrestore(&base_crng.lock, flags); + memzero_explicit(key, sizeof(key)); +@@ -711,7 +705,6 @@ static void extract_entropy(void *buf, s + + static void __cold _credit_init_bits(size_t bits) + { +- static struct execute_work set_ready; + unsigned int new, orig, add; + unsigned long flags; + +@@ -727,7 +720,6 @@ static void __cold _credit_init_bits(siz + + if (orig < POOL_READY_BITS && new >= POOL_READY_BITS) { + crng_reseed(); /* Sets crng_init to CRNG_READY under base_crng.lock. */ +- execute_in_process_context(crng_set_ready, &set_ready); + process_random_ready_list(); + wake_up_interruptible(&crng_init_wait); + kill_fasync(&fasync, SIGIO, POLL_IN); diff --git a/queue-5.10/series b/queue-5.10/series index 8f6ca7b8b6f..510bae2e3f9 100644 --- a/queue-5.10/series +++ b/queue-5.10/series @@ -444,3 +444,4 @@ bfq-remove-pointless-bfq_init_rq-calls.patch bfq-get-rid-of-__bio_blkcg-usage.patch bfq-make-sure-bfqg-for-which-we-are-queueing-requests-is-online.patch block-fix-bio_clone_blkg_association-to-associate-with-proper-blkcg_gq.patch +revert-random-use-static-branch-for-crng_ready.patch