[PATCH] kernel: set CONFIG_RCU_FANOUT=64 for 64bit targets

Stijn Tintel stijn at linux-ipv6.be
Fri Jul 30 10:56:09 PDT 2021 

The generic config has CONFIG_RCU_EXPERT=y, which exposes
CONFIG_RCU_FANOUT. This is set to 32 in the generic config, but the
default for 64bit kernels is 64. This causes a warning during boot:

[    0.000000] rcu:     CONFIG_RCU_FANOUT set to non-default value of 32.

Set CONFIG_RCU_FANOUT=64 in kernel configs of 64bit targets, unless the
target config has disabled CONFIG_RCU_EXPERT.

Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
---
 target/linux/armvirt/64/config-5.10      | 1 +
 target/linux/armvirt/64/config-5.4       | 1 +
 target/linux/bcm27xx/bcm2710/config-5.4  | 1 +
 target/linux/bcm27xx/bcm2711/config-5.4  | 1 +
 target/linux/bcm4908/config-5.4          | 1 +
 target/linux/malta/be64/config-default   | 1 +
 target/linux/malta/le64/config-default   | 1 +
 target/linux/mediatek/mt7622/config-5.10 | 1 +
 target/linux/mvebu/cortexa53/config-5.10 | 1 +
 target/linux/mvebu/cortexa53/config-5.4  | 1 +
 target/linux/mvebu/cortexa72/config-5.10 | 1 +
 target/linux/mvebu/cortexa72/config-5.4  | 1 +
 target/linux/octeon/config-5.10          | 1 +
 target/linux/octeon/config-5.4           | 1 +
 target/linux/octeontx/config-5.4         | 1 +
 target/linux/sunxi/cortexa53/config-5.4  | 1 +
 target/linux/uml/config/x86_64           | 1 +
 target/linux/x86/64/config-5.10          | 1 +
 target/linux/x86/64/config-5.4           | 1 +
 19 files changed, 19 insertions(+)

diff --git a/target/linux/armvirt/64/config-5.10 b/target/linux/armvirt/64/config-5.10
index 51f3c3c952..7cd542fc81 100644
--- a/target/linux/armvirt/64/config-5.10
+++ b/target/linux/armvirt/64/config-5.10
@@ -130,6 +130,7 @@ CONFIG_POWER_RESET_VEXPRESS=y
 CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGMAP=y
 CONFIG_REGMAP_MMIO=y
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
diff --git a/target/linux/armvirt/64/config-5.4 b/target/linux/armvirt/64/config-5.4
index 2317dcd39d..464c7bfaa3 100644
--- a/target/linux/armvirt/64/config-5.4
+++ b/target/linux/armvirt/64/config-5.4
@@ -134,6 +134,7 @@ CONFIG_POWER_RESET_VEXPRESS=y
 CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGMAP=y
 CONFIG_REGMAP_MMIO=y
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
diff --git a/target/linux/bcm27xx/bcm2710/config-5.4 b/target/linux/bcm27xx/bcm2710/config-5.4
index 27884a0567..b0718a5f8d 100644
--- a/target/linux/bcm27xx/bcm2710/config-5.4
+++ b/target/linux/bcm27xx/bcm2710/config-5.4
@@ -364,6 +364,7 @@ CONFIG_RASPBERRYPI_POWER=y
 CONFIG_RATIONAL=y
 # CONFIG_RAVE_SP_CORE is not set
 CONFIG_RAW_DRIVER=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_REFCOUNT_FULL=y
diff --git a/target/linux/bcm27xx/bcm2711/config-5.4 b/target/linux/bcm27xx/bcm2711/config-5.4
index c82ae44942..40af97965f 100644
--- a/target/linux/bcm27xx/bcm2711/config-5.4
+++ b/target/linux/bcm27xx/bcm2711/config-5.4
@@ -376,6 +376,7 @@ CONFIG_RASPBERRYPI_POWER=y
 CONFIG_RATIONAL=y
 # CONFIG_RAVE_SP_CORE is not set
 CONFIG_RAW_DRIVER=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_REFCOUNT_FULL=y
diff --git a/target/linux/bcm4908/config-5.4 b/target/linux/bcm4908/config-5.4
index 6f43a822c8..9076ae8cc2 100644
--- a/target/linux/bcm4908/config-5.4
+++ b/target/linux/bcm4908/config-5.4
@@ -183,6 +183,7 @@ CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RATIONAL=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_REFCOUNT_FULL=y
diff --git a/target/linux/malta/be64/config-default b/target/linux/malta/be64/config-default
index ef044bb8ca..7d22120c14 100644
--- a/target/linux/malta/be64/config-default
+++ b/target/linux/malta/be64/config-default
@@ -7,3 +7,4 @@ CONFIG_CPU_MIPS64_R2=y
 # CONFIG_MIPS32_N32 is not set
 # CONFIG_MIPS32_O32 is not set
 # CONFIG_MIPS_VA_BITS_48 is not set
+CONFIG_RCU_FANOUT=64
diff --git a/target/linux/malta/le64/config-default b/target/linux/malta/le64/config-default
index 69e5387a1f..72ed33365f 100644
--- a/target/linux/malta/le64/config-default
+++ b/target/linux/malta/le64/config-default
@@ -6,3 +6,4 @@ CONFIG_CPU_MIPS64_R2=y
 # CONFIG_MIPS32_N32 is not set
 # CONFIG_MIPS32_O32 is not set
 # CONFIG_MIPS_VA_BITS_48 is not set
+CONFIG_RCU_FANOUT=64
diff --git a/target/linux/mediatek/mt7622/config-5.10 b/target/linux/mediatek/mt7622/config-5.10
index caf0293f41..9d039212b0 100644
--- a/target/linux/mediatek/mt7622/config-5.10
+++ b/target/linux/mediatek/mt7622/config-5.10
@@ -368,6 +368,7 @@ CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
 CONFIG_RATIONAL=y
 # CONFIG_RAVE_SP_CORE is not set
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_REALTEK_PHY=y
diff --git a/target/linux/mvebu/cortexa53/config-5.10 b/target/linux/mvebu/cortexa53/config-5.10
index 24f26474bc..6b343d4658 100644
--- a/target/linux/mvebu/cortexa53/config-5.10
+++ b/target/linux/mvebu/cortexa53/config-5.10
@@ -66,6 +66,7 @@ CONFIG_POWER_RESET=y
 CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGULATOR_GPIO=y
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
 CONFIG_SPARSEMEM=y
diff --git a/target/linux/mvebu/cortexa53/config-5.4 b/target/linux/mvebu/cortexa53/config-5.4
index b88de78ee4..00943648f5 100644
--- a/target/linux/mvebu/cortexa53/config-5.4
+++ b/target/linux/mvebu/cortexa53/config-5.4
@@ -75,6 +75,7 @@ CONFIG_POWER_RESET=y
 CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGULATOR_GPIO=y
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
 CONFIG_SPARSEMEM=y
diff --git a/target/linux/mvebu/cortexa72/config-5.10 b/target/linux/mvebu/cortexa72/config-5.10
index 1d8affc290..f5a9881e25 100644
--- a/target/linux/mvebu/cortexa72/config-5.10
+++ b/target/linux/mvebu/cortexa72/config-5.10
@@ -74,6 +74,7 @@ CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGULATOR_GPIO=y
 # CONFIG_RODATA_FULL_DEFAULT_ENABLED is not set
 CONFIG_SPARSEMEM=y
diff --git a/target/linux/mvebu/cortexa72/config-5.4 b/target/linux/mvebu/cortexa72/config-5.4
index 12b2ea399c..99c8cc2e40 100644
--- a/target/linux/mvebu/cortexa72/config-5.4
+++ b/target/linux/mvebu/cortexa72/config-5.4
@@ -83,6 +83,7 @@ CONFIG_POWER_SUPPLY=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_REGULATOR_GPIO=y
 # CONFIG_RODATA_FULL_DEFAULT_ENABLED is not set
 CONFIG_SPARSEMEM=y
diff --git a/target/linux/octeon/config-5.10 b/target/linux/octeon/config-5.10
index 20c4a354d9..1f449a2773 100644
--- a/target/linux/octeon/config-5.10
+++ b/target/linux/octeon/config-5.10
@@ -198,6 +198,7 @@ CONFIG_POSIX_MQUEUE_SYSCTL=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RELAY=y
diff --git a/target/linux/octeon/config-5.4 b/target/linux/octeon/config-5.4
index f4fc948fcc..e2bc033db1 100644
--- a/target/linux/octeon/config-5.4
+++ b/target/linux/octeon/config-5.4
@@ -192,6 +192,7 @@ CONFIG_POSIX_MQUEUE_SYSCTL=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RELAY=y
diff --git a/target/linux/octeontx/config-5.4 b/target/linux/octeontx/config-5.4
index daecd33715..a3798bdbfc 100644
--- a/target/linux/octeontx/config-5.4
+++ b/target/linux/octeontx/config-5.4
@@ -480,6 +480,7 @@ CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
 CONFIG_RATIONAL=y
 # CONFIG_RAVE_SP_CORE is not set
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 # CONFIG_READ_ONLY_THP_FOR_FS is not set
diff --git a/target/linux/sunxi/cortexa53/config-5.4 b/target/linux/sunxi/cortexa53/config-5.4
index 1d8fd49d43..5bf05268b7 100644
--- a/target/linux/sunxi/cortexa53/config-5.4
+++ b/target/linux/sunxi/cortexa53/config-5.4
@@ -136,6 +136,7 @@ CONFIG_PINCTRL_SUN50I_H6=y
 CONFIG_PINCTRL_SUN50I_H6_R=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
 # CONFIG_SND_SUN50I_CODEC_ANALOG is not set
 CONFIG_SOUND_OSS_CORE_PRECLAIM=y
diff --git a/target/linux/uml/config/x86_64 b/target/linux/uml/config/x86_64
index 1d35dda2dc..9b0010b708 100644
--- a/target/linux/uml/config/x86_64
+++ b/target/linux/uml/config/x86_64
@@ -91,6 +91,7 @@ CONFIG_POSIX_MQUEUE_SYSCTL=y
 # CONFIG_PROCESSOR_SELECT is not set
 CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_PTY_CHAN=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RD_BZIP2=y
 CONFIG_RD_GZIP=y
 CONFIG_RELAY=y
diff --git a/target/linux/x86/64/config-5.10 b/target/linux/x86/64/config-5.10
index 6804d83519..6c80aca13e 100644
--- a/target/linux/x86/64/config-5.10
+++ b/target/linux/x86/64/config-5.10
@@ -364,6 +364,7 @@ CONFIG_PVH=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RELAY=y
diff --git a/target/linux/x86/64/config-5.4 b/target/linux/x86/64/config-5.4
index 50521a5148..71fdb3953a 100644
--- a/target/linux/x86/64/config-5.4
+++ b/target/linux/x86/64/config-5.4
@@ -370,6 +370,7 @@ CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 # CONFIG_RANDOMIZE_BASE is not set
 CONFIG_RAS=y
+CONFIG_RCU_FANOUT=64
 CONFIG_RCU_NEED_SEGCBLIST=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_REGMAP=y
-- 
2.31.1

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