linux-kernel - amd_mce.c redundant if check?

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Message-ID: <CAFSsvmrZ3adzO_eNTc_ZWB3QGpfjPybj6O=x1-=a9=02pSG2qw@mail.gmail.com>
Date:	Wed, 20 Aug 2014 11:18:21 -0600
From:	Adam Duskett <aduskett@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: amd_mce.c redundant if check?

I have recently come upon this section of code in
arch/x86/kernel/cpu/mcheck/mce_amd.c that seems to be a redundant
unnecessary if check.

>From line 170 - 176:

if (tr->set_lvt_off) {
if (lvt_off_valid(tr->b, tr->lvt_off, lo, hi)) {
/* set new lvt offset */
hi &= ~MASK_LVTOFF_HI;
hi |= tr->lvt_off << 20;
}
}

This seems like it's not actually doing anything because it's setting
the same value that the bit-field already has to itself.

Any reason for this?

Thanks!
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