linux-kernel - Re: [REGRESSION] x86/entry: TIF_SINGLESTEP handling is still broken

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Message-ID: <CAHk-=wgeG7WP_vxho_bfENK3rYP9zUF0_ZjA1X3OftERrs_j2w@mail.gmail.com>
Date:   Sun, 31 Jan 2021 13:30:16 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Kyle Huey <me@...ehuey.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Gabriel Krisman Bertazi <krisman@...labora.com>,
        open list <linux-kernel@...r.kernel.org>,
        "Robert O'Callahan" <rocallahan@...il.com>
Subject: Re: [REGRESSION] x86/entry: TIF_SINGLESTEP handling is still broken

Btw Kyle, do you have a good simple test-case for this? Clearly this
is some weird special case use, and regular single-stepping works
fine.

             Linus