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| author | Rafał Miłecki <rafal@milecki.pl> | 2022-06-15 12:36:37 +0200 |
|---|---|---|
| committer | Rafał Miłecki <rafal@milecki.pl> | 2022-07-08 15:38:42 +0200 |
| commit | 4ec80cd907f25a056c1bca82d6ab722e59321eba (patch) | |
| tree | 272aabcc5d727cfb19cfb0db4cf4272f7f8b373b /target/linux | |
| parent | b0968be02e264876e79e297d984ec82262344e7a (diff) | |
| download | upstream-4ec80cd907f25a056c1bca82d6ab722e59321eba.tar.gz upstream-4ec80cd907f25a056c1bca82d6ab722e59321eba.tar.bz2 upstream-4ec80cd907f25a056c1bca82d6ab722e59321eba.zip | |
kernel: drop patch adding hardcoded kernel compilation flags
1. KCFLAGS should be used for custom flags
2. Optimization flags are arch / SoC specific
3. -fno-reorder-blocks may *worsen* network performace on some SoCs
4. Usage of flags was *reversed* since 5.4 and noone reported that
If we really need custom flags then CONFIG_KERNEL_CFLAGS should get
default value adjusted properly (per target).
Ref: 4e0c54bc5bc8 ("kernel: add support for kernel 5.4")
Link: http://lists.openwrt.org/pipermail/openwrt-devel/2022-June/038853.html
Link: https://patchwork.ozlabs.org/project/openwrt/patch/20190409093046.13401-1-zajec5@gmail.com/
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 22168ae68101b95d03741b0e9e8ad20b8a5ae5b7)
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/generic/pending-5.4/201-extra_optimization.patch | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/target/linux/generic/pending-5.4/201-extra_optimization.patch b/target/linux/generic/pending-5.4/201-extra_optimization.patch deleted file mode 100644 index 4395a3e6a7..0000000000 --- a/target/linux/generic/pending-5.4/201-extra_optimization.patch +++ /dev/null @@ -1,25 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Subject: Upgrade to Linux 2.6.19 - -- Includes large parts of the patch from #1021 by dpalffy -- Includes RB532 NAND driver changes by n0-1 - -[john@phrozen.org: feix will add this to his upstream queue] - -lede-commit: bff468813f78f81e36ebb2a3f4354de7365e640f -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - Makefile | 6 +++--- - 1 file changed, 3 insertions(+), 3 deletions(-) - ---- a/Makefile -+++ b/Makefile -@@ -723,7 +723,7 @@ KBUILD_CFLAGS += -O2 - else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 - KBUILD_CFLAGS += -O3 - else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE --KBUILD_CFLAGS += -Os -+KBUILD_CFLAGS += -Os -fno-reorder-blocks -fno-tree-ch - endif - - # Tell gcc to never replace conditional load with a non-conditional one |