arm64: remove pointless __KERNEL__ guards

For a number of years, UAPI headers have been split from kernel-internal
headers. The latter are never exposed to userspace, and always built
with __KERNEL__ defined.

Most headers under arch/arm64 don't have __KERNEL__ guards, but there
are a few stragglers lying around. To make things more consistent, and
to set a good example going forward, let's remove these redundant
__KERNEL__ guards.

In a couple of cases, a trailing #endif lacked a comment describing its
corresponding #if or #ifdef, so these are fixes up at the same time.

Guards in auto-generated crypto code are left as-is, as these guards are
generated by scripting imported from the upstream openssl project
scripts. Guards in UAPI headers are left as-is, as these can be included
by userspace or the kernel.

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

arch/arm64/include/asm/atomic.h

@@ -15,8 +15,6 @@
 #include <asm/barrier.h>
 #include <asm/lse.h>
 
-#ifdef __KERNEL__
-
 #define __ARM64_IN_ATOMIC_IMPL
 
 #if defined(CONFIG_ARM64_LSE_ATOMICS) && defined(CONFIG_AS_LSE)
@@ -157,5 +155,4 @@
 
 #include <asm-generic/atomic-instrumented.h>
 
-#endif
-#endif
+#endif /* __ASM_ATOMIC_H */

arch/arm64/include/asm/compat.h

@@ -4,7 +4,6 @@
  */
 #ifndef __ASM_COMPAT_H
 #define __ASM_COMPAT_H
-#ifdef __KERNEL__
 #ifdef CONFIG_COMPAT
 
 /*
@@ -215,5 +214,4 @@ static inline int is_compat_thread(struct thread_info *thread)
 }
 
 #endif /* CONFIG_COMPAT */
-#endif /* __KERNEL__ */
 #endif /* __ASM_COMPAT_H */

arch/arm64/include/asm/debug-monitors.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_DEBUG_MONITORS_H
 #define __ASM_DEBUG_MONITORS_H
 
-#ifdef __KERNEL__
-
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <asm/brk-imm.h>
@@ -128,5 +126,4 @@ static inline int reinstall_suspended_bps(struct pt_regs *regs)
 int aarch32_break_handler(struct pt_regs *regs);
 
 #endif	/* __ASSEMBLY */
-#endif	/* __KERNEL__ */
 #endif	/* __ASM_DEBUG_MONITORS_H */

arch/arm64/include/asm/dma-mapping.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_DMA_MAPPING_H
 #define __ASM_DMA_MAPPING_H
 
-#ifdef __KERNEL__
-
 #include <linux/types.h>
 #include <linux/vmalloc.h>
 
@@ -27,5 +25,4 @@ static inline bool is_device_dma_coherent(struct device *dev)
 	return dev->dma_coherent;
 }
 
-#endif	/* __KERNEL__ */
 #endif	/* __ASM_DMA_MAPPING_H */

arch/arm64/include/asm/fpsimd.h

@@ -21,7 +21,7 @@
 #include <linux/stddef.h>
 #include <linux/types.h>
 
-#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
+#ifdef CONFIG_COMPAT
 /* Masks for extracting the FPSR and FPCR from the FPSCR */
 #define VFP_FPSCR_STAT_MASK	0xf800009f
 #define VFP_FPSCR_CTRL_MASK	0x07f79f00

arch/arm64/include/asm/futex.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_FUTEX_H
 #define __ASM_FUTEX_H
 
-#ifdef __KERNEL__
-
 #include <linux/futex.h>
 #include <linux/uaccess.h>
 
@@ -129,5 +127,4 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *_uaddr,
 	return ret;
 }
 
-#endif /* __KERNEL__ */
 #endif /* __ASM_FUTEX_H */

arch/arm64/include/asm/hw_breakpoint.h

@@ -10,8 +10,6 @@
 #include <asm/sysreg.h>
 #include <asm/virt.h>
 
-#ifdef __KERNEL__
-
 struct arch_hw_breakpoint_ctrl {
 	u32 __reserved	: 19,
 	len		: 8,
@@ -156,5 +154,4 @@ static inline int get_num_wrps(void)
 						ID_AA64DFR0_WRPS_SHIFT);
 }
 
-#endif	/* __KERNEL__ */
 #endif	/* __ASM_BREAKPOINT_H */

arch/arm64/include/asm/io.h

@@ -8,8 +8,6 @@
 #ifndef __ASM_IO_H
 #define __ASM_IO_H
 
-#ifdef __KERNEL__
-
 #include <linux/types.h>
 
 #include <asm/byteorder.h>
@@ -207,5 +205,4 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
 
 extern int devmem_is_allowed(unsigned long pfn);
 
-#endif	/* __KERNEL__ */
 #endif	/* __ASM_IO_H */

arch/arm64/include/asm/irqflags.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_IRQFLAGS_H
 #define __ASM_IRQFLAGS_H
 
-#ifdef __KERNEL__
-
 #include <asm/alternative.h>
 #include <asm/ptrace.h>
 #include <asm/sysreg.h>
@@ -128,5 +126,4 @@ static inline void arch_local_irq_restore(unsigned long flags)
 		: "memory");
 }
 
-#endif
-#endif
+#endif /* __ASM_IRQFLAGS_H */

arch/arm64/include/asm/pci.h

 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_PCI_H
 #define __ASM_PCI_H
-#ifdef __KERNEL__
 
 #include <linux/types.h>
 #include <linux/slab.h>
@@ -35,5 +34,4 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 }
 #endif  /* CONFIG_PCI */
 
-#endif  /* __KERNEL__ */
 #endif  /* __ASM_PCI_H */

arch/arm64/include/asm/proc-fns.h

@@ -9,7 +9,6 @@
 #ifndef __ASM_PROCFNS_H
 #define __ASM_PROCFNS_H
 
-#ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
 #include <asm/page.h>
@@ -25,5 +24,4 @@ extern u64 cpu_do_resume(phys_addr_t ptr, u64 idmap_ttbr);
 #include <asm/memory.h>
 
 #endif /* __ASSEMBLY__ */
-#endif /* __KERNEL__ */
 #endif /* __ASM_PROCFNS_H */

arch/arm64/include/asm/processor.h

@@ -20,7 +20,6 @@
 #define NET_IP_ALIGN	0
 
 #ifndef __ASSEMBLY__
-#ifdef __KERNEL__
 
 #include <linux/build_bug.h>
 #include <linux/cache.h>
@@ -283,8 +282,6 @@ static inline void spin_lock_prefetch(const void *ptr)
 
 #define HAVE_ARCH_PICK_MMAP_LAYOUT
 
-#endif
-
 extern unsigned long __ro_after_init signal_minsigstksz; /* sigframe size */
 extern void __init minsigstksz_setup(void);
 

arch/arm64/include/asm/signal32.h

@@ -5,7 +5,6 @@
 #ifndef __ASM_SIGNAL32_H
 #define __ASM_SIGNAL32_H
 
-#ifdef __KERNEL__
 #ifdef CONFIG_COMPAT
 #include <linux/compat.h>
 
@@ -79,5 +78,4 @@ static inline void compat_setup_restart_syscall(struct pt_regs *regs)
 {
 }
 #endif /* CONFIG_COMPAT */
-#endif /* __KERNEL__ */
 #endif /* __ASM_SIGNAL32_H */

arch/arm64/include/asm/thread_info.h

@@ -8,8 +8,6 @@
 #ifndef __ASM_THREAD_INFO_H
 #define __ASM_THREAD_INFO_H
 
-#ifdef __KERNEL__
-
 #include <linux/compiler.h>
 
 #ifndef __ASSEMBLY__
@@ -121,5 +119,4 @@ void arch_release_task_struct(struct task_struct *tsk);
 	.addr_limit	= KERNEL_DS,					\
 }
 
-#endif /* __KERNEL__ */
 #endif /* __ASM_THREAD_INFO_H */

arch/arm64/include/asm/vdso.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_VDSO_H
 #define __ASM_VDSO_H
 
-#ifdef __KERNEL__
-
 /*
  * Default link address for the vDSO.
  * Since we randomise the VDSO mapping, there's little point in trying
@@ -28,6 +26,4 @@
 
 #endif /* !__ASSEMBLY__ */
 
-#endif /* __KERNEL__ */
-
 #endif /* __ASM_VDSO_H */

arch/arm64/include/asm/vdso_datapage.h

@@ -5,8 +5,6 @@
 #ifndef __ASM_VDSO_DATAPAGE_H
 #define __ASM_VDSO_DATAPAGE_H
 
-#ifdef __KERNEL__
-
 #ifndef __ASSEMBLY__
 
 struct vdso_data {
@@ -32,6 +30,4 @@ struct vdso_data {
 
 #endif /* !__ASSEMBLY__ */
 
-#endif /* __KERNEL__ */
-
 #endif /* __ASM_VDSO_DATAPAGE_H */