rseq: Remove superfluous rseq_len from task_struct

[linux-2.6-microblaze.git] / kernel / rseq.c

diff --git a/kernel/rseq.c b/kernel/rseq.c
index 849afe7..9424ee9 100644 (file)
--- a/kernel/rseq.c
+++ b/kernel/rseq.c
@@ -313,7 +313,7 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len,
                /* Unregister rseq for current thread. */
                if (current->rseq != rseq || !current->rseq)
                        return -EINVAL;
-               if (current->rseq_len != rseq_len)
+               if (rseq_len != sizeof(*rseq))
                        return -EINVAL;
                if (current->rseq_sig != sig)
                        return -EPERM;
@@ -321,7 +321,6 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len,
                if (ret)
                        return ret;
                current->rseq = NULL;
-               current->rseq_len = 0;
                current->rseq_sig = 0;
                return 0;
        }
@@ -335,7 +334,7 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len,
                 * the provided address differs from the prior
                 * one.
                 */
-               if (current->rseq != rseq || current->rseq_len != rseq_len)
+               if (current->rseq != rseq || rseq_len != sizeof(*rseq))
                        return -EINVAL;
                if (current->rseq_sig != sig)
                        return -EPERM;
@@ -353,7 +352,6 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len,
        if (!access_ok(rseq, rseq_len))
                return -EFAULT;
        current->rseq = rseq;
-       current->rseq_len = rseq_len;
        current->rseq_sig = sig;
        /*
         * If rseq was previously inactive, and has just been