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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-07-27 11:49:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-07-27 11:49:37 +0200
commit65a9bde6ed484880987a6d88de6e372eca52059f (patch)
treea192e1a8a54d334f457413f9c16041ffdf11533d /drivers/char
parent860e73b49cd933c708e3e1e1e07cdea81b6acd1c (diff)
parent92ed301919932f777713b9172e525674157e983d (diff)
Merge 5.8-rc7 into char-misc-next
This should resolve the merge/build issues reported when trying to create linux-next. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/mem.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 934c92dcb9ab..687d4af6945d 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -814,7 +814,8 @@ static struct inode *devmem_inode;
#ifdef CONFIG_IO_STRICT_DEVMEM
void revoke_devmem(struct resource *res)
{
- struct inode *inode = READ_ONCE(devmem_inode);
+ /* pairs with smp_store_release() in devmem_init_inode() */
+ struct inode *inode = smp_load_acquire(&devmem_inode);
/*
* Check that the initialization has completed. Losing the race
@@ -1028,8 +1029,11 @@ static int devmem_init_inode(void)
return rc;
}
- /* publish /dev/mem initialized */
- WRITE_ONCE(devmem_inode, inode);
+ /*
+ * Publish /dev/mem initialized.
+ * Pairs with smp_load_acquire() in revoke_devmem().
+ */
+ smp_store_release(&devmem_inode, inode);
return 0;
}