diff options
| author | Mike Rapoport (IBM) <rppt@kernel.org> | 2024-05-05 19:06:25 +0300 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2024-05-14 10:31:44 +0300 |
| commit | 14e56fb2ed1dbc3c3171d12ab435b0f691f6f215 (patch) | |
| tree | 7e18fa25186ef17a4bf931a0446dcf0355156339 /arch | |
| parent | 0cc2dc4902f425e346d46deeea2352d9fba75375 (diff) | |
| download | linux-14e56fb2ed1dbc3c3171d12ab435b0f691f6f215.tar.xz | |
x86/ftrace: enable dynamic ftrace without CONFIG_MODULES
Dynamic ftrace must allocate memory for code and this was impossible
without CONFIG_MODULES.
With execmem separated from the modules code, execmem_text_alloc() is
available regardless of CONFIG_MODULES.
Remove dependency of dynamic ftrace on CONFIG_MODULES and make
CONFIG_DYNAMIC_FTRACE select CONFIG_EXECMEM in Kconfig.
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/ftrace.c | 10 |
2 files changed, 1 insertions, 10 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fe196f49d278..965d65edbae0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -34,6 +34,7 @@ config X86_64 select SWIOTLB select ARCH_HAS_ELFCORE_COMPAT select ZONE_DMA32 + select EXECMEM if DYNAMIC_FTRACE config FORCE_DYNAMIC_FTRACE def_bool y diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index c8ddb7abda7c..8da0e66ca22d 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -261,8 +261,6 @@ void arch_ftrace_update_code(int command) /* Currently only x86_64 supports dynamic trampolines */ #ifdef CONFIG_X86_64 -#ifdef CONFIG_MODULES -/* Module allocation simplifies allocating memory for code */ static inline void *alloc_tramp(unsigned long size) { return execmem_alloc(EXECMEM_FTRACE, size); @@ -271,14 +269,6 @@ static inline void tramp_free(void *tramp) { execmem_free(tramp); } -#else -/* Trampolines can only be created if modules are supported */ -static inline void *alloc_tramp(unsigned long size) -{ - return NULL; -} -static inline void tramp_free(void *tramp) { } -#endif /* Defined as markers to the end of the ftrace default trampolines */ extern void ftrace_regs_caller_end(void); |