linux-kernel - [PATCH 2/2] x86: vdso: Remove redundant ifdeffery around in_ia32

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Message-Id: <20240910-x86-vdso-ifdef-v1-2-877c9df9b081@linutronix.de>
Date: Tue, 10 Sep 2024 12:11:36 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...hat.com>, 
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 
 Eric Biederman <ebiederm@...ssion.com>, Kees Cook <kees@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 2/2] x86: vdso: Remove redundant ifdeffery around
 in_ia32_syscall()

The ifdefs only guard code that is also guarded by in_ia32_syscall(),
which already contains the same ifdefs itself.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 arch/x86/entry/vdso/vma.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 9059b9d96393..ab2b011471e0 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -75,7 +75,6 @@ static vm_fault_t vdso_fault(const struct vm_special_mapping *sm,
 static void vdso_fix_landing(const struct vdso_image *image,
 		struct vm_area_struct *new_vma)
 {
-#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
 	if (in_ia32_syscall() && image == &vdso_image_32) {
 		struct pt_regs *regs = current_pt_regs();
 		unsigned long vdso_land = image->sym_int80_landing_pad;
@@ -86,7 +85,6 @@ static void vdso_fix_landing(const struct vdso_image *image,
 		if (regs->ip == old_land_addr)
 			regs->ip = new_vma->vm_start + vdso_land;
 	}
-#endif
 }

 static int vdso_mremap(const struct vm_special_mapping *sm,
@@ -339,7 +337,6 @@ int compat_arch_setup_additional_pages(struct linux_binprm *bprm,

 bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
 {
-#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
 	const struct vdso_image *image = current->mm->context.vdso_image;
 	unsigned long vdso = (unsigned long) current->mm->context.vdso;

@@ -348,7 +345,6 @@ bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
 		    regs->ip == vdso + image->sym_vdso32_rt_sigreturn_landing_pad)
 			return true;
 	}
-#endif
 	return false;
 }

-- 
2.46.0