From: David Laight <David.Laight@ACULAB.COM>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
'Linus Torvalds' <torvalds@linux-foundation.org>
Subject: load_unaligned_zeropad() on x86-64
Date: Sat, 14 Nov 2020 15:53:29 +0000 [thread overview]
Message-ID: <46823b75d3c54a89a7192d8e1011e212@AcuMS.aculab.com> (raw)
The change e419b4cc585680940bc42f8ca8a071d6023fb1bb added
asm code for load_unaligned_zeropad().
However it doesn't look right for 64bit.
It masks the address with ~3 not ~7 so the second
access could still cross a page boundary and fault.
David
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next reply other threads:[~2020-11-14 15:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-14 15:53 David Laight [this message]
2020-11-14 18:02 ` Linus Torvalds
2020-11-14 23:17 ` David Laight
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