linux-kernel - [PATCH v2] x86/vdso: shrink vdso/vdso32-setup.i via IWYU

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Date: Thu, 04 Jan 2024 20:46:25 +0000
From: Tanzir Hasan <tanzirh@...gle.com>
To: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 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>
Cc: Nick Desaulniers <nnn@...gle.com>, linux-kernel@...r.kernel.org, 
	Nick Desaulniers <ndesaulniers@...gle.com>, Tanzir Hasan <tanzirh@...gle.com>
Subject: [PATCH v2] x86/vdso: shrink vdso/vdso32-setup.i via IWYU

This diff uses an open source tool include-what-you-use (IWYU) to modify
the include list, changing indirect includes to direct includes. IWYU is
implemented using the IWYUScripts github repository which is a tool that
is currently undergoing development. These changes seek to improve build
times.

This change to vdso/vdso32-setup.c resulted in a preprocessed size of
vdso/vdso32-setup.i from 44009 lines to 18572 lines (-58%) for the x86
defconfig.

Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Tanzir Hasan <tanzirh@...gle.com>
---
Changes in v2:
- Fixed messed up signed-off-by tag
- Link to v1: https://lore.kernel.org/r/20240104-vdso32setup-v1-1-1737147bc6ed@google.com
---
 arch/x86/entry/vdso/vdso32-setup.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/x86/entry/vdso/vdso32-setup.c b/arch/x86/entry/vdso/vdso32-setup.c
index 76e4e74f35b5..8dbe022589a6 100644
--- a/arch/x86/entry/vdso/vdso32-setup.c
+++ b/arch/x86/entry/vdso/vdso32-setup.c
@@ -8,13 +8,11 @@
  */
 
 #include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/mm_types.h>
-#include <linux/elf.h>
+#include <linux/kstrtox.h>
+#include <linux/printk.h>
+#include <linux/stddef.h>
 
-#include <asm/processor.h>
-#include <asm/vdso.h>
+#include <asm/cache.h>
 
 #ifdef CONFIG_COMPAT_VDSO
 #define VDSO_DEFAULT	0

---
base-commit: f5837722ffecbbedf1b1dbab072a063565f0dad1
change-id: 20231228-vdso32setup-8e336d60ac3e

Best regards,
-- 
Tanzir Hasan <tanzirh@...gle.com>