diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 30 | ||||
| -rw-r--r-- | init/initramfs.c | 2 | ||||
| -rw-r--r-- | init/main.c | 7 |
3 files changed, 32 insertions, 7 deletions
diff --git a/init/Kconfig b/init/Kconfig index abf65098f1b6b..7e5c3ddc341de 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -87,7 +87,7 @@ config CC_HAS_ASM_GOTO_OUTPUT config CC_HAS_ASM_GOTO_TIED_OUTPUT depends on CC_HAS_ASM_GOTO_OUTPUT # Detect buggy gcc and clang, fixed in gcc-11 clang-14. - def_bool $(success,echo 'int foo(int *x) { asm goto (".long (%l[bar]) - .\n": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $CC -x c - -c -o /dev/null) + def_bool $(success,echo 'int foo(int *x) { asm goto (".long (%l[bar]) - .": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $CC -x c - -c -o /dev/null) config TOOLS_SUPPORT_RELR def_bool $(success,env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh) @@ -159,10 +159,12 @@ config WERROR help A kernel build should not cause any compiler warnings, and this enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags - to enforce that rule by default. + to enforce that rule by default. Certain warnings from other tools + such as the linker may be upgraded to errors with this option as + well. - However, if you have a new (or very old) compiler with odd and - unusual warnings, or you have some architecture with problems, + However, if you have a new (or very old) compiler or linker with odd + and unusual warnings, or you have some architecture with problems, you may need to disable this config option in order to successfully build the kernel. @@ -1454,6 +1456,13 @@ config LD_ORPHAN_WARN def_bool y depends on ARCH_WANT_LD_ORPHAN_WARN depends on $(ld-option,--orphan-handling=warn) + depends on $(ld-option,--orphan-handling=error) + +config LD_ORPHAN_WARN_LEVEL + string + depends on LD_ORPHAN_WARN + default "error" if WERROR + default "warn" config SYSCTL bool @@ -1723,6 +1732,19 @@ config KALLSYMS symbolic stack backtraces. This increases the size of the kernel somewhat, as all symbols have to be loaded into the kernel image. +config KALLSYMS_SELFTEST + bool "Test the basic functions and performance of kallsyms" + depends on KALLSYMS + default n + help + Test the basic functions and performance of some interfaces, such as + kallsyms_lookup_name. It also calculates the compression rate of the + kallsyms compression algorithm for the current symbol set. + + Start self-test automatically after system startup. Suggest executing + "dmesg | grep kallsyms_selftest" to collect test results. "finish" is + displayed in the last line, indicating that the test is complete. + config KALLSYMS_ALL bool "Include all symbols in kallsyms" depends on DEBUG_KERNEL && KALLSYMS diff --git a/init/initramfs.c b/init/initramfs.c index 2f5bfb7d76521..62321883fe613 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -461,7 +461,7 @@ static long __init write_buffer(char *buf, unsigned long len) static long __init flush_buffer(void *bufv, unsigned long len) { - char *buf = (char *) bufv; + char *buf = bufv; long written; long origLen = len; if (message) diff --git a/init/main.c b/init/main.c index 5372ea2437352..e1c3911d7c707 100644 --- a/init/main.c +++ b/init/main.c @@ -145,7 +145,8 @@ void (*__initdata late_time_init)(void); /* Untouched command line saved by arch-specific code. */ char __initdata boot_command_line[COMMAND_LINE_SIZE]; /* Untouched saved command line (eg. for /proc) */ -char *saved_command_line; +char *saved_command_line __ro_after_init; +unsigned int saved_command_line_len __ro_after_init; /* Command line for parameter parsing */ static char *static_command_line; /* Untouched extra command line */ @@ -667,6 +668,8 @@ static void __init setup_command_line(char *command_line) strcpy(saved_command_line + len, extra_init_args); } } + + saved_command_line_len = strlen(saved_command_line); } /* @@ -1379,7 +1382,7 @@ static void __init do_initcall_level(int level, char *command_line) static void __init do_initcalls(void) { int level; - size_t len = strlen(saved_command_line) + 1; + size_t len = saved_command_line_len + 1; char *command_line; command_line = kzalloc(len, GFP_KERNEL); |