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kernel: only optimized for size if small_flash

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Add a new config option to allow to select the default compile
optimization level for the kernel.

Select the optimization for size by default if the small_flash feature is
set. Otherwise "Optimize for performance" is set.

Add the small_flash feature flag to all (sub)targets which had the
optimization for size in their default kernel config.

Remove CC_OPTIMIZE_FOR_* symbols from all kernel configs to apply the new
setting.

Exceptions to the above are:

  - lantiq, where the optimization for size is only required for the
    xway_legacy subtarget but was set for the whole target
  - mediatek, ramips/mt7620 & ramips/mt76x8 where boards should have
    plenty of space and an optimization for size doesn't make much sense
  - rb532, which has 128MByte flash

Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Mathias Kresin
2018-07-09 20:48:56 +02:00
parent 621fa91a82
commit cf7154db07
29 changed files with 30 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
target/linux/layerscape/armv8_32b/config-4.9
View File

@@ -145,8 +145,6 @@ CONFIG_CAN_RAW=y
# CONFIG_CAN_SJA1000 is not set
# CONFIG_CAN_SOFTING is not set
# CONFIG_CAN_TI_HECC is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
# CONFIG_CFS_BANDWIDTH is not set
CONFIG_CGROUPS=y
CONFIG_CGROUP_CPUACCT=y

2
target/linux/layerscape/armv8_64b/config-4.9
View File

@@ -156,8 +156,6 @@ CONFIG_CAVIUM_ERRATUM_22375=y
CONFIG_CAVIUM_ERRATUM_23144=y
CONFIG_CAVIUM_ERRATUM_23154=y
CONFIG_CAVIUM_ERRATUM_27456=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_CEPH_LIB=y
# CONFIG_CEPH_LIB_PRETTYDEBUG is not set
# CONFIG_CEPH_LIB_USE_DNS_RESOLVER is not set