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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-01 14:42:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-01 14:42:49 -0700
commitb5b1de3537e2cd8f52971224a1be24bb3ce34a65 (patch)
treecd199730744628103c36b14c878b94af4fea4735 /mm
parent90de1fb83e7c760aa403381f072486fc4e3e8b5f (diff)
parent79f800b2e76923cd8ce0aa659cb5c019d9643bc9 (diff)
downloadlinux-b5b1de3537e2cd8f52971224a1be24bb3ce34a65.tar.gz
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio/vhost updates from Michael Tsirkin: "Fixes and tweaks: - virtio balloon page hinting support - vhost scsi control queue - misc fixes" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: MAINTAINERS: remove reference to bogus vsock file vhost/scsi: Use common handling code in request queue handler vhost/scsi: Extract common handling code from control queue handler vhost/scsi: Respond to control queue operations vhost/scsi: truncate T10 PI iov_iter to prot_bytes virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON mm/page_poison: expose page_poisoning_enabled to kernel modules virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT kvm_config: add CONFIG_VIRTIO_MENU
Diffstat (limited to 'mm')
-rw-r--r--mm/page_poison.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/page_poison.c b/mm/page_poison.c
index f7e2a676365a..f0c15e9017c0 100644
--- a/mm/page_poison.c
+++ b/mm/page_poison.c
@@ -17,6 +17,11 @@ static int __init early_page_poison_param(char *buf)
}
early_param("page_poison", early_page_poison_param);
+/**
+ * page_poisoning_enabled - check if page poisoning is enabled
+ *
+ * Return true if page poisoning is enabled, or false if not.
+ */
bool page_poisoning_enabled(void)
{
/*
@@ -29,6 +34,7 @@ bool page_poisoning_enabled(void)
(!IS_ENABLED(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC) &&
debug_pagealloc_enabled()));
}
+EXPORT_SYMBOL_GPL(page_poisoning_enabled);
static void poison_page(struct page *page)
{