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| author | Jason Gunthorpe <jgg@mellanox.com> | 2018-09-05 16:21:22 -0600 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-09-05 16:21:22 -0600 |
| commit | 2c910cb75e1fe6de52d95c8e32caedd1629a33a5 (patch) | |
| tree | 94a0eea6f8cde689d11e7583ddd0a930b8785ab4 /arch/x86/lib/usercopy.c | |
| parent | 627212c9d49ba2759b699450f5d8f45f73e062fa (diff) | |
| parent | b53b1c08a23eb1091982daacb2122f90a7094a77 (diff) | |
Merge branch 'uverbs_dev_cleanups' into rdma.git for-next
For dependencies, branch based on rdma.git 'for-rc' of
https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/
Pull 'uverbs_dev_cleanups' from Leon Romanovsky:
====================
Reuse the char device code interfaces to simplify ib_uverbs_device
creation and destruction. As part of this series, we are sending fix to
cleanup path, which was discovered during internal review,
The fix definitely can go to -rc, but it means that this series will be
dependent on rdma-rc.
====================
* branch 'uverbs_dev_cleanups':
RDMA/uverbs: Use device.groups to initialize device attributes
RDMA/uverbs: Use cdev_device_add() instead of cdev_add()
RDMA/core: Depend on device_add() to add device attributes
RDMA/uverbs: Fix error cleanup path of ib_uverbs_add_one()
Resolved conflict in ib_device_unregister_sysfs()
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'arch/x86/lib/usercopy.c')
| -rw-r--r-- | arch/x86/lib/usercopy.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c index c8c6ad0d58b89..3f435d7fca5e6 100644 --- a/arch/x86/lib/usercopy.c +++ b/arch/x86/lib/usercopy.c @@ -7,6 +7,8 @@ #include <linux/uaccess.h> #include <linux/export.h> +#include <asm/tlbflush.h> + /* * We rely on the nested NMI work to allow atomic faults from the NMI path; the * nested NMI paths are careful to preserve CR2. @@ -19,6 +21,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n) if (__range_not_ok(from, n, TASK_SIZE)) return n; + if (!nmi_uaccess_okay()) + return n; + /* * Even though this function is typically called from NMI/IRQ context * disable pagefaults so that its behaviour is consistent even when |