[PATCH 09/10] arm64: select DYNAMIC_DEBUG_RELATIVE_POINTERS

Rasmus Villemoes
2019-04-09T21:26:23Z

Similar to GENERIC_BUG_RELATIVE_POINTERS, one can now relativize the
four const char* members of struct _ddebug, thus saving 16 bytes per
instance (one for each pr_debug(), dev_debug() etc. in a
CONFIG_DYNAMIC_DEBUG kernel). The asm-generic implementation seems to
work out-of-the-box, though this is only compile-tested.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/Kbuild | 1 +
2 files changed, 2 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7e34b9eba5de..d0871d523d5d 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -83,6 +83,7 @@ config ARM64
select CRC32
select DCACHE_WORD_ACCESS
select DMA_DIRECT_REMAP
+ select DYNAMIC_DEBUG_RELATIVE_POINTERS
select EDAC_SUPPORT
select FRAME_POINTER
select GENERIC_ALLOCATOR
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index 1e17ea5c372b..1ead0d645686 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -3,6 +3,7 @@ generic-y += delay.h
generic-y += div64.h
generic-y += dma.h
generic-y += dma-contiguous.h
+generic-y += dynamic_debug.h
generic-y += early_ioremap.h
generic-y += emergency-restart.h
generic-y += hw_irq.h
--
2.20.1