KVM: MMU: Clean up the error handling of walk_addr_generic()
Avoid two step jump to the error handling part. This eliminates the use of the variables present and rsvd_fault. We also use the const type qualifier to show that write/user/fetch_fault do not change in the function. Both of these were suggested by Ingo Molnar. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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