hexagon: Remove CONFIG_HEXAGON_ARCH_VERSION from uapi header

uapi headers should not expose CONFIG switches since they are not
available in userspace. Fix it in arch/hexagon/include/uapi/asm/user.h
by always defining the cs0 and cs1 entries instead of pad values.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: huth

arch/hexagon/include/uapi/asm/user.h

@@ -56,15 +56,10 @@ struct user_regs_struct {
 	unsigned long pc;
 	unsigned long cause;
 	unsigned long badva;
-#if CONFIG_HEXAGON_ARCH_VERSION < 4
-	unsigned long pad1;  /* pad out to 48 words total */
-	unsigned long pad2;  /* pad out to 48 words total */
-	unsigned long pad3;  /* pad out to 48 words total */
-#else
+	/* cs0 and cs1 are only available with HEXAGON_ARCH_VERSION >= 4 */
 	unsigned long cs0;
 	unsigned long cs1;
 	unsigned long pad1;  /* pad out to 48 words total */
-#endif
 };
 
 #endif

arch/hexagon/kernel/ptrace.c

@@ -74,7 +74,7 @@ static int genregs_set(struct task_struct *target,
 		   unsigned int pos, unsigned int count,
 		   const void *kbuf, const void __user *ubuf)
 {
-	int ret;
+	int ret, ignore_offset;
 	unsigned long bucket;
 	struct pt_regs *regs = task_pt_regs(target);
 
@@ -111,12 +111,15 @@ static int genregs_set(struct task_struct *target,
 #if CONFIG_HEXAGON_ARCH_VERSION >=4
 	INEXT(&regs->cs0, cs0);
 	INEXT(&regs->cs1, cs1);
+	ignore_offset = offsetof(struct user_regs_struct, pad1);
+#else
+	ignore_offset = offsetof(struct user_regs_struct, cs0);
 #endif
 
 	/* Ignore the rest, if needed */
 	if (!ret)
 		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-			offsetof(struct user_regs_struct, pad1), -1);
+					  ignore_offset, -1);
 	else
 		return ret;
 

scripts/headers_install.sh

@@ -74,7 +74,6 @@ arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_16K
 arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_4K
 arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE
 arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
-arch/hexagon/include/uapi/asm/user.h:CONFIG_HEXAGON_ARCH_VERSION
 arch/m68k/include/uapi/asm/ptrace.h:CONFIG_COLDFIRE
 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT