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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-10 10:40:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-10 10:40:41 -0700
commit0af5cb349a2c97fbabb3cede96efcde9d54b7940 (patch)
tree16a7f2c4eac7d06fab0139d27aa99f5ddef6605f /init/Kconfig
parentd4252071b97d2027d246f6a82cbee4d52f618b47 (diff)
parent672fb6740cbfde34f4d367ffa3c939b608a927e1 (diff)
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Merge tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada: - Remove the support for -O3 (CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3) - Fix error of rpm-pkg cross-builds - Support riscv for checkstack tool - Re-enable -Wformwat warnings for Clang - Clean up modpost, Makefiles, and misc scripts * tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits) modpost: remove .symbol_white_list field entirely modpost: remove unneeded .symbol_white_list initializers modpost: add PATTERNS() helper macro modpost: shorten warning messages in report_sec_mismatch() Revert "Kbuild, lto, workaround: Don't warn for initcall_reference in modpost" modpost: use more reliable way to get fromsec in section_rel(a)() modpost: add array range check to sec_name() modpost: refactor get_secindex() kbuild: set EXIT trap before creating temporary directory modpost: remove unused Elf_Sword macro Makefile.extrawarn: re-enable -Wformat for clang kbuild: add dtbs_prepare target kconfig: Qt5: tell the user which packages are required modpost: use sym_get_data() to get module device_table data modpost: drop executable ELF support checkstack: add riscv support for scripts/checkstack.pl kconfig: shorten the temporary directory name for cc-option scripts: headers_install.sh: Update config leak ignore entries kbuild: error out if $(INSTALL_MOD_PATH) contains % or : kbuild: error out if $(KBUILD_EXTMOD) contains % or : ...
Diffstat (limited to 'init/Kconfig')
-rw-r--r--init/Kconfig16
1 files changed, 5 insertions, 11 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 922848a094d7..80fe60fa77fb 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1411,13 +1411,6 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
with the "-O2" compiler flag for best performance and most
helpful compile-time warnings.
-config CC_OPTIMIZE_FOR_PERFORMANCE_O3
- bool "Optimize more for performance (-O3)"
- depends on ARC
- help
- Choosing this option will pass "-O3" to your compiler to optimize
- the kernel yet more for performance.
-
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size (-Os)"
help
@@ -1733,16 +1726,17 @@ config KALLSYMS_ALL
help
Normally kallsyms only contains the symbols of functions for nicer
OOPS messages and backtraces (i.e., symbols from the text and inittext
- sections). This is sufficient for most cases. And only in very rare
- cases (e.g., when a debugger is used) all symbols are required (e.g.,
- names of variables from the data sections, etc).
+ sections). This is sufficient for most cases. And only if you want to
+ enable kernel live patching, or other less common use cases (e.g.,
+ when a debugger is used) all symbols are required (i.e., names of
+ variables from the data sections, etc).
This option makes sure that all symbols are loaded into the kernel
image (i.e., symbols from all sections) in cost of increased kernel
size (depending on the kernel configuration, it may be 300KiB or
something like this).
- Say N unless you really need all symbols.
+ Say N unless you really need all symbols, or kernel live patching.
config KALLSYMS_ABSOLUTE_PERCPU
bool