Replace hardcoded padding size value for struct kvm_sync_regs
with #define SYNC_REGS_SIZE_BYTES.
Also update the value specified in api.txt from outdated hardcoded
value to SYNC_REGS_SIZE_BYTES.
Signed-off-by: Ken Hofsass <hofsass@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
Documentation/virtual/kvm/api.txt | 2 +-
include/uapi/linux/kvm.h | 6 +++++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index e5f1743e0b3e..de55fe173afe 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -3809,7 +3809,7 @@ in userspace.
__u64 kvm_dirty_regs;
union {
struct kvm_sync_regs regs;
- char padding[1024];
+ char padding[SYNC_REGS_SIZE_BYTES];
} s;
If KVM_CAP_SYNC_REGS is defined, these fields allow userspace to access
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 62c564dd4aa1..e88ed6325e0e 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -396,6 +396,10 @@ struct kvm_run {
char padding[256];
};
+ /* 2048 is the size of the char array used to bound/pad the size
+ * of the union that holds sync regs.
+ */
+ #define SYNC_REGS_SIZE_BYTES 2048
/*
* shared registers between kvm and userspace.
* kvm_valid_regs specifies the register classes set by the host
@@ -407,7 +411,7 @@ struct kvm_run {
__u64 kvm_dirty_regs;
union {
struct kvm_sync_regs regs;
- char padding[2048];
+ char padding[SYNC_REGS_SIZE_BYTES];
} s;
};
--
2.16.0.rc1.238.g530d649a79-goog
