x86/entry/32: Remove SEP test for SYSEXIT

SEP must be already be present in order for do_fast_syscall_32() to be
called on native 32-bit, so checking it again is unnecessary.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230721161018.50214-6-brgerst@gmail.com

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index f1f3bf150b57f63197362cdd4e0cd2cced9a61dd..0551bcb197fb1f9a0c797ac38909011d038e64c1 100644 (file)
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -238,8 +238,7 @@ __visible noinstr bool do_fast_syscall_32(struct pt_regs *regs)
         * We don't allow syscalls at all from VM86 mode, but we still
         * need to check VM, because we might be returning from sys_vm86.
         */
-       return static_cpu_has(X86_FEATURE_SEP) &&
-               regs->cs == __USER_CS && regs->ss == __USER_DS &&
+       return regs->cs == __USER_CS && regs->ss == __USER_DS &&
                regs->ip == landing_pad &&
                (regs->flags & (X86_EFLAGS_RF | X86_EFLAGS_TF | X86_EFLAGS_VM)) == 0;
 #endif