ARM: uapi: Drop PSR_ENDSTATE

The symbol PSR_ENDSTATE is pointless for userspace. Drop it from the
UAPI headers and instead inline it into the only two callers.

As as side-effect, remove a leak of an internal kconfig symbol through
the UAPI headers.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/lkml/d2ad12f2-3d65-4bef-890c-65d78a33d790@app.fastmail.com/
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: t-8ch

arch/arm/include/asm/processor.h

@@ -73,7 +73,8 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset,
 		regs->ARM_cpsr = USR26_MODE;				\
 	if (elf_hwcap & HWCAP_THUMB && pc & 1)				\
 		regs->ARM_cpsr |= PSR_T_BIT;				\
-	regs->ARM_cpsr |= PSR_ENDSTATE;					\
+	if (IS_ENABLED(CONFIG_CPU_ENDIAN_BE8))				\
+		regs->ARM_cpsr |= PSR_E_BIT;				\
 	regs->ARM_pc = pc & ~1;		/* pc */			\
 	regs->ARM_sp = sp;		/* sp */			\
 })

arch/arm/include/uapi/asm/ptrace.h

@@ -102,15 +102,6 @@
 #define PSR_IT_MASK	0x0600fc00	/* If-Then execution state mask */
 #define PSR_ENDIAN_MASK	0x00000200	/* Endianness state mask */
 
-/*
- * Default endianness state
- */
-#ifdef CONFIG_CPU_ENDIAN_BE8
-#define PSR_ENDSTATE	PSR_E_BIT
-#else
-#define PSR_ENDSTATE	0
-#endif
-
 /* 
  * These are 'magic' values for PTRACE_PEEKUSR that return info about where a
  * process is located in memory.

arch/arm/kernel/signal.c

@@ -337,7 +337,8 @@ setup_return(struct pt_regs *regs, struct ksignal *ksig,
 			return 1;
 	}
 
-	cpsr |= PSR_ENDSTATE;
+	if (IS_ENABLED(CONFIG_CPU_ENDIAN_BE8))
+		cpsr |= PSR_E_BIT;
 
 	/*
 	 * Maybe we need to deliver a 32-bit signal to a 26-bit task.

scripts/headers_install.sh

@@ -70,7 +70,6 @@ configs=$(sed -e '
 #
 # The format is <file-name>:<CONFIG-option> in each line.
 config_leak_ignores="
-arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
 arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION