linux-kernel - [PATCH] LoongArch: ptrace: Use UAPI types in UAPI header

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Message-Id: <20251029-loongarch-uapi-ptrace-types-v1-1-5c84855a348d@weissschuh.net>
Date: Wed, 29 Oct 2025 16:20:34 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>, 
 Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] LoongArch: ptrace: Use UAPI types in UAPI header

The kernel UAPI headers already contain fixed-width integer types,
there is no need to rely on libc types. There may not be a libc
available or it may not provide <stdint.h>, like for example on nolibc.

This also aligns the header with the rest of the LoongArch UAPI headers.

Fixes: 803b0fc5c3f2 ("LoongArch: Add process management")
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
I'd like to take this through the nolibc tree, as this currently breaks
the upcoming nolibc ptrace support.
---
 arch/loongarch/include/uapi/asm/ptrace.h | 40 ++++++++++++++------------------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/arch/loongarch/include/uapi/asm/ptrace.h b/arch/loongarch/include/uapi/asm/ptrace.h
index aafb3cd9e943..215e0f9e8aa3 100644
--- a/arch/loongarch/include/uapi/asm/ptrace.h
+++ b/arch/loongarch/include/uapi/asm/ptrace.h
@@ -10,10 +10,6 @@
 
 #include <linux/types.h>
 
-#ifndef __KERNEL__
-#include <stdint.h>
-#endif
-
 /*
  * For PTRACE_{POKE,PEEK}USR. 0 - 31 are GPRs,
  * 32 is syscall's original ARG0, 33 is PC, 34 is BADVADDR.
@@ -41,44 +37,44 @@ struct user_pt_regs {
 } __attribute__((aligned(8)));
 
 struct user_fp_state {
-	uint64_t fpr[32];
-	uint64_t fcc;
-	uint32_t fcsr;
+	__u64 fpr[32];
+	__u64 fcc;
+	__u32 fcsr;
 };
 
 struct user_lsx_state {
 	/* 32 registers, 128 bits width per register. */
-	uint64_t vregs[32*2];
+	__u64 vregs[32*2];
 };
 
 struct user_lasx_state {
 	/* 32 registers, 256 bits width per register. */
-	uint64_t vregs[32*4];
+	__u64 vregs[32*4];
 };
 
 struct user_lbt_state {
-	uint64_t scr[4];
-	uint32_t eflags;
-	uint32_t ftop;
+	__u64 scr[4];
+	__u32 eflags;
+	__u32 ftop;
 };
 
 struct user_watch_state {
-	uint64_t dbg_info;
+	__u64 dbg_info;
 	struct {
-		uint64_t    addr;
-		uint64_t    mask;
-		uint32_t    ctrl;
-		uint32_t    pad;
+		__u64    addr;
+		__u64    mask;
+		__u32    ctrl;
+		__u32    pad;
 	} dbg_regs[8];
 };
 
 struct user_watch_state_v2 {
-	uint64_t dbg_info;
+	__u64 dbg_info;
 	struct {
-		uint64_t    addr;
-		uint64_t    mask;
-		uint32_t    ctrl;
-		uint32_t    pad;
+		__u64    addr;
+		__u64    mask;
+		__u32    ctrl;
+		__u32    pad;
 	} dbg_regs[14];
 };
 

---
base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
change-id: 20251029-loongarch-uapi-ptrace-types-0c5c6756f7e0

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>