The maximum number of arm64 CPU cores (excluding the real-time core) in
Renesas ARM SoCs is 8.
The default value of NR_CPUS used to be 64, causing a negligible kernel
size increase of ca. 16 KiB, compared to the minimum needed value of 8.
As of commit 846a415bf4408ccd ("arm64: default NR_CPUS to
256"), the default value of NR_CPUS was increased to 256, increasing the
waste by another 78 KiB.
Reduce NR_CPUS to 8, reducing kernel size by ca. 94 KiB.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
arch/arm64/configs/renesas_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig
index 5561d30a3f270e26..4480e7dc40180bcd 100644
--- a/arch/arm64/configs/renesas_defconfig
+++ b/arch/arm64/configs/renesas_defconfig
@@ -40,6 +40,7 @@ CONFIG_ARCH_RENESAS=y
# CONFIG_HISILICON_ERRATUM_161600802 is not set
CONFIG_ARM64_VA_BITS_48=y
CONFIG_SCHED_MC=y
+CONFIG_NR_CPUS=8
CONFIG_SECCOMP=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
--
2.17.1
