diff options
| author | Brian Gerst <brgerst@gmail.com> | 2023-07-21 19:10:16 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-10-05 11:06:43 +0300 |
| commit | bab9fa6dc5e4483749838877deebe038de3ce97e (patch) | |
| tree | bb6b5a27f00aa9d0b98710227f661f260a7a938d /arch/x86/entry | |
| parent | 0d3109ad2e6125add5b3c88e8de3fb7bfd4e8c49 (diff) | |
| download | linux-bab9fa6dc5e4483749838877deebe038de3ce97e.tar.xz | |
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
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/common.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index f1f3bf150b57..0551bcb197fb 100644 --- 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 |