From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Steve Capper <steve.capper@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>, Qian Cai <cai@lca.pw>,
Andrey Konovalov <andreyknvl@google.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Will Deacon <will@kernel.org>
Subject: [PATCH 7/8] arm64: memory: Add comments to end of non-trivial #ifdef blocks
Date: Tue, 13 Aug 2019 18:01:48 +0100 [thread overview]
Message-ID: <20190813170149.26037-8-will@kernel.org> (raw)
In-Reply-To: <20190813170149.26037-1-will@kernel.org>
Commenting the #endif of a multi-statement #ifdef block with the
condition which guards it is useful and can save having to scroll back
through the file to figure out which set of Kconfig options apply to
a particular piece of code.
Signed-off-by: Will Deacon <will@kernel.org>
---
arch/arm64/include/asm/memory.h | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index e902132b808c..d31e4b6e349f 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -57,11 +57,13 @@
#define PCI_IO_END (VMEMMAP_START - SZ_2M)
#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE)
#define FIXADDR_TOP (PCI_IO_START - SZ_2M)
+
#if VA_BITS > 48
#define VA_BITS_MIN (48)
#else
#define VA_BITS_MIN (VA_BITS)
#endif
+
#define _VA_START(va) (-(UL(1) << ((va) - 1)))
#define KERNEL_START _text
@@ -86,7 +88,7 @@
#else
#define KASAN_THREAD_SHIFT 0
#define KASAN_SHADOW_END (_VA_START(VA_BITS_MIN))
-#endif
+#endif /* CONFIG_KASAN */
#define MIN_THREAD_SHIFT (14 + KASAN_THREAD_SHIFT)
@@ -224,7 +226,7 @@ static inline unsigned long kaslr_offset(void)
#define __tag_shifted(tag) 0UL
#define __tag_reset(addr) (addr)
#define __tag_get(addr) 0
-#endif
+#endif /* CONFIG_KASAN_SW_TAGS */
static inline const void *__tag_set(const void *addr, u8 tag)
{
@@ -263,7 +265,7 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
#else
#define __virt_to_phys(x) __virt_to_phys_nodebug(x)
#define __phys_addr_symbol(x) __pa_symbol_nodebug(x)
-#endif
+#endif /* CONFIG_DEBUG_VIRTUAL */
#define __phys_to_virt(x) ((unsigned long)((x) - physvirt_offset))
#define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset))
@@ -323,14 +325,14 @@ static inline void *phys_to_virt(phys_addr_t x)
u64 __addr = VMEMMAP_START + (__idx * sizeof(struct page)); \
(struct page *)__addr; \
})
-#endif
+#endif /* !CONFIG_SPARSEMEM_VMEMMAP || CONFIG_DEBUG_VIRTUAL */
#define virt_addr_valid(addr) ({ \
__typeof__(addr) __addr = addr; \
__is_lm_address(__addr) && pfn_valid(virt_to_pfn(__addr)); \
})
-#endif
+#endif /* !ASSEMBLY */
/*
* Given that the GIC architecture permits ITS implementations that can only be
@@ -345,4 +347,4 @@ static inline void *phys_to_virt(phys_addr_t x)
#include <asm-generic/memory_model.h>
-#endif
+#endif /* __ASM_MEMORY_H */
--
2.11.0
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next prev parent reply other threads:[~2019-08-13 17:03 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 17:01 [PATCH 0/8] Fix issues with 52-bit kernel virtual addressing Will Deacon
2019-08-13 17:01 ` [PATCH 1/8] arm64: memory: Fix virt_addr_valid() using __is_lm_address() Will Deacon
2019-08-13 18:09 ` Ard Biesheuvel
2019-08-13 19:11 ` Steve Capper
2019-08-13 19:25 ` Ard Biesheuvel
2019-08-13 20:34 ` Steve Capper
2019-08-14 15:17 ` Ard Biesheuvel
2019-08-14 8:32 ` Will Deacon
2019-08-13 18:53 ` Steve Capper
2019-08-14 9:19 ` Catalin Marinas
2019-08-14 9:48 ` Will Deacon
2019-08-14 10:40 ` Catalin Marinas
2019-08-14 12:02 ` Will Deacon
2019-08-13 17:01 ` [PATCH 2/8] arm64: memory: Ensure address tag is masked in conversion macros Will Deacon
2019-08-13 18:54 ` Steve Capper
2019-08-14 9:23 ` Catalin Marinas
2019-08-13 17:01 ` [PATCH 3/8] arm64: memory: Rewrite default page_to_virt()/virt_to_page() Will Deacon
2019-08-13 18:54 ` Steve Capper
2019-08-14 9:30 ` Catalin Marinas
2019-08-14 9:41 ` Will Deacon
2019-08-14 10:56 ` Mark Rutland
2019-08-14 11:17 ` Will Deacon
2019-08-14 11:26 ` Mark Rutland
2019-08-13 17:01 ` [PATCH 4/8] arm64: memory: Simplify virt_to_page() implementation Will Deacon
2019-08-13 18:55 ` Steve Capper
2019-08-14 9:32 ` Catalin Marinas
2019-08-13 17:01 ` [PATCH 5/8] arm64: memory: Simplify _VA_START and _PAGE_OFFSET definitions Will Deacon
2019-08-13 18:55 ` Steve Capper
2019-08-14 9:33 ` Catalin Marinas
2019-08-14 11:23 ` Mark Rutland
2019-08-14 12:00 ` Will Deacon
2019-08-14 13:18 ` Mark Rutland
2019-08-13 17:01 ` [PATCH 6/8] arm64: memory: Implement __tag_set() as common function Will Deacon
2019-08-13 18:56 ` Steve Capper
2019-08-14 9:34 ` Catalin Marinas
2019-08-13 17:01 ` Will Deacon [this message]
2019-08-13 18:57 ` [PATCH 7/8] arm64: memory: Add comments to end of non-trivial #ifdef blocks Steve Capper
2019-08-14 9:35 ` Catalin Marinas
2019-08-13 17:01 ` [PATCH 8/8] arm64: memory: Cosmetic cleanups Will Deacon
2019-08-13 18:57 ` Steve Capper
2019-08-14 9:35 ` Catalin Marinas
2019-08-13 18:53 ` [PATCH 0/8] Fix issues with 52-bit kernel virtual addressing Steve Capper
2019-08-14 8:01 ` Geert Uytterhoeven
2019-08-14 11:29 ` Mark Rutland
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