linux-kernel - Re: [GIT PULL] kbuild changes for v4.9-rc1

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Message-ID: <eff67256-ea61-ef88-251b-b67fcf6a9538@gmail.com>
Date:   Sun, 18 Dec 2016 16:54:07 +0200
From:   Nikolay Borisov <n.borisov.lkml@...il.com>
To:     Jiri Slaby <jslaby@...e.cz>,
        Arend Van Spriel <arend.vanspriel@...adcom.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Adam Borowski <kilobyte@...band.pl>,
        Nicholas Piggin <npiggin@...il.com>,
        Omar Sandoval <osandov@...ndov.com>,
        Michal Marek <mmarek@...e.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [GIT PULL] kbuild changes for v4.9-rc1



On 18.12.2016 16:45, Jiri Slaby wrote:
> Moreover, with some modules, __put_user_1 and others are reported
> instead of mcount.


nm vmlinux | grep __fentry__
nm vmlinux | grep mcount

What do these report ? I bet you that in your vmlinux the first one
would return something like :

ffffffff822f1810 T __fentry__
ffffffff827fdc20 r __kcrctab___fentry__
ffffffff82809461 r __kstrtab___fentry__
ffffffff827e6c20 R __ksymtab___fentry__
 and nothing for the second. Whereas doing nm on the module in question
would give nothing for __fentry__ and something like: U mcount