[PATCH 3/5] powerpc/lib: checksum GUAP support

[Russell Currey]

Wrap the checksumming code in GUAP locks and unlocks.

Signed-off-by: Russell Currey <ruscur at russell.cc>
---
 arch/powerpc/lib/checksum_wrappers.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/lib/checksum_wrappers.c b/arch/powerpc/lib/checksum_wrappers.c
index a0cb63fb76a1..c67db0a6e18b 100644
--- a/arch/powerpc/lib/checksum_wrappers.c
+++ b/arch/powerpc/lib/checksum_wrappers.c
@@ -28,6 +28,7 @@ __wsum csum_and_copy_from_user(const void __user *src, void *dst,
 {
 	unsigned int csum;
 
+	unlock_user_access();
 	might_sleep();
 
 	*err_ptr = 0;
@@ -60,6 +61,7 @@ __wsum csum_and_copy_from_user(const void __user *src, void *dst,
 	}
 
 out:
+	lock_user_access();
 	return (__force __wsum)csum;
 }
 EXPORT_SYMBOL(csum_and_copy_from_user);
@@ -69,6 +71,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
 {
 	unsigned int csum;
 
+	unlock_user_access();
 	might_sleep();
 
 	*err_ptr = 0;
@@ -97,6 +100,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
 	}
 
 out:
+	lock_user_access();
 	return (__force __wsum)csum;
 }
 EXPORT_SYMBOL(csum_and_copy_to_user);
-- 
2.19.1