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authorKalesh Singh <kaleshsingh@google.com>2022-06-30 19:12:29 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-07-01 10:39:20 +0200
commit261e224d6a5c43e2bb8a07b7662f9b4ec425cfec (patch)
tree396865844df8f25f504e2fe66b52bbce4610d832 /drivers/char
parent80fc671bcc0173836e9032b0c698ea74c13b9d7c (diff)
pm/sleep: Add PM_USERSPACE_AUTOSLEEP Kconfig
Systems that initiate frequent suspend/resume from userspace can make the kernel aware by enabling PM_USERSPACE_AUTOSLEEP config. This allows for certain sleep-sensitive code (wireguard/rng) to decide on what preparatory work should be performed (or not) in their pm_notification callbacks. This patch was prompted by the discussion at [1] which attempts to remove CONFIG_ANDROID that currently guards these code paths. [1] https://lore.kernel.org/r/20220629150102.1582425-1-hch@lst.de/ Suggested-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Kalesh Singh <kaleshsingh@google.com> Link: https://lore.kernel.org/r/20220630191230.235306-1-kaleshsingh@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/random.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index e3dd1dd3dd22..8c90f535d149 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -755,8 +755,8 @@ static int random_pm_notification(struct notifier_block *nb, unsigned long actio
spin_unlock_irqrestore(&input_pool.lock, flags);
if (crng_ready() && (action == PM_RESTORE_PREPARE ||
- (action == PM_POST_SUSPEND &&
- !IS_ENABLED(CONFIG_PM_AUTOSLEEP) && !IS_ENABLED(CONFIG_ANDROID)))) {
+ (action == PM_POST_SUSPEND && !IS_ENABLED(CONFIG_PM_AUTOSLEEP) &&
+ !IS_ENABLED(CONFIG_PM_USERSPACE_AUTOSLEEP)))) {
crng_reseed();
pr_notice("crng reseeded on system resumption\n");
}