From: Thomas Weißschuh <linux@weissschuh.net>
Date: Tue, 28 Oct 2025 09:15:38 +0000 (+0100)
Subject: um: Split out default elf_aux_hwcap
X-Git-Tag: v6.19-rc1~104^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83b4b44a2b05330d13a4432caae0b036f9621ea1;p=thirdparty%2Fkernel%2Flinux.git

um: Split out default elf_aux_hwcap

Setting all auxiliary vector values to default values if one of them
was not provided by the host will discard perfectly fine values.

Remove the elf_aux_platform fallback from the vDSO ones.
As zero is the correct fallback anyways, don't create a new conditional.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20251028-uml-remove-32bit-pseudo-vdso-v1-3-e930063eff5f@weissschuh.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index 4aadb9ea5ae3a..9ee0e31997904 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -62,11 +62,9 @@ __init void scan_elf_aux( char **envp)
 		}
 	}
 	if ( ! __kernel_vsyscall || ! vsyscall_ehdr ||
-	     ! elf_aux_hwcap ||
 	     ! page_size || (vsyscall_ehdr % page_size) ) {
 		__kernel_vsyscall = 0;
 		vsyscall_ehdr = 0;
-		elf_aux_hwcap = 0;
 	}
 	else {
 		vsyscall_end = vsyscall_ehdr + page_size;