From: Thorsten Blum <thorsten.blum@linux.dev>
To: Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Randy Dunlap <rdunlap@infradead.org>
Cc: x86@kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
Thorsten Blum <thorsten.blum@linux.dev>
Subject: [PATCH RESEND 3/3] Documentation/arch/x86: Remove obsolete vdso32=2 compatibility note
Date: Tue, 14 Jul 2026 01:34:26 +0200 [thread overview]
Message-ID: <20260713233422.127348-8-thorsten.blum@linux.dev> (raw)
In-Reply-To: <20260713233422.127348-5-thorsten.blum@linux.dev>
Commit b0b49f2673f0 ("x86, vdso: Remove compat vdso support") removed
compat vDSO support and documented vdso32=2 as an alias for vdso32=0.
However, since commit c06989da39cd ("x86/vdso: Ensure vdso32_enabled
gets set to valid values only"), vdso32_setup() accepts only 0 and 1.
Remove the obsolete vdso32=2 compatibility note and document only the
supported values.
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
Documentation/admin-guide/kernel-parameters.txt | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index b5493a7f8f22..8a55ec37d066 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -8260,15 +8260,12 @@ Kernel parameters
vdso32= [X86] Control the 32-bit vDSO
vdso32=1: enable 32-bit VDSO
- vdso32=0 or vdso32=2: disable 32-bit VDSO
+ vdso32=0: disable 32-bit VDSO
See the help text for CONFIG_COMPAT_VDSO for more
details. If CONFIG_COMPAT_VDSO is set, the default is
vdso32=0; otherwise, the default is vdso32=1.
- For compatibility with older kernels, vdso32=2 is an
- alias for vdso32=0.
-
Try vdso32=0 if you encounter an error that says:
dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
next prev parent reply other threads:[~2026-07-13 23:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-13 23:34 [PATCH RESEND 0/3] x86/vdso: Improve vdso=/vdso32= boot parameter validation Thorsten Blum
2026-07-13 23:34 ` [PATCH RESEND 1/3] x86/vdso: Use kstrtouint() to validate vdso= boot parameter Thorsten Blum
2026-07-13 23:34 ` [PATCH RESEND 2/3] x86/vdso: Use kstrtouint() to validate vdso32= " Thorsten Blum
2026-07-13 23:34 ` Thorsten Blum [this message]
2026-07-13 23:40 ` [PATCH RESEND 0/3] x86/vdso: Improve vdso=/vdso32= boot parameter validation Dave Hansen
2026-07-14 11:19 ` Thorsten Blum
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