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riscv: remove MCOUNT_NAME workaround
Now that the minimum supported version of LLVM for building the kernel has
been bumped to 13.0.1, the condition for using _mcount as MCOUNT_NAME is
always true, as the build will fail during the configuration stage for
older LLVM versions. Replace MCOUNT_NAME with _mcount directly.
This effectively reverts commit 7ce0477150
("riscv: Workaround mcount
name prior to clang-13").
Link: https://lkml.kernel.org/r/20240125-bump-min-llvm-ver-to-13-0-1-v1-7-f5ff9bda41c5@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: "Aneesh Kumar K.V (IBM)" <aneesh.kumar@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Conor Dooley <conor@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
parent
9a12e9a165
commit
de5f398466
@ -13,19 +13,9 @@
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#endif
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#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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/*
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* Clang prior to 13 had "mcount" instead of "_mcount":
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* https://github.com/llvm/llvm-project/commit/ef58ae86ba778ed7d01cd3f6bd6d08f943abab44
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*/
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#if defined(CONFIG_CC_IS_GCC) || CONFIG_CLANG_VERSION >= 130000
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#define MCOUNT_NAME _mcount
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#else
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#define MCOUNT_NAME mcount
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#endif
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#define ARCH_SUPPORTS_FTRACE_OPS 1
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#ifndef __ASSEMBLY__
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void MCOUNT_NAME(void);
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void _mcount(void);
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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return addr;
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@ -75,7 +65,7 @@ struct dyn_arch_ftrace {
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* both auipc and jalr at the same time.
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*/
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#define MCOUNT_ADDR ((unsigned long)MCOUNT_NAME)
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#define MCOUNT_ADDR ((unsigned long)_mcount)
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#define JALR_SIGN_MASK (0x00000800)
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#define JALR_OFFSET_MASK (0x00000fff)
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#define AUIPC_OFFSET_MASK (0xfffff000)
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@ -50,8 +50,8 @@
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SYM_TYPED_FUNC_START(ftrace_stub)
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#ifdef CONFIG_DYNAMIC_FTRACE
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.global MCOUNT_NAME
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.set MCOUNT_NAME, ftrace_stub
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.global _mcount
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.set _mcount, ftrace_stub
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#endif
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ret
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SYM_FUNC_END(ftrace_stub)
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@ -80,7 +80,7 @@ SYM_FUNC_END(return_to_handler)
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#endif
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#ifndef CONFIG_DYNAMIC_FTRACE
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SYM_FUNC_START(MCOUNT_NAME)
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SYM_FUNC_START(_mcount)
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la t4, ftrace_stub
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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la t0, ftrace_graph_return
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@ -126,6 +126,6 @@ SYM_FUNC_START(MCOUNT_NAME)
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jalr t5
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RESTORE_ABI_STATE
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ret
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SYM_FUNC_END(MCOUNT_NAME)
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SYM_FUNC_END(_mcount)
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#endif
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EXPORT_SYMBOL(MCOUNT_NAME)
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EXPORT_SYMBOL(_mcount)
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@ -352,7 +352,7 @@ if ($arch eq "x86_64") {
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$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
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} elsif ($arch eq "riscv") {
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$function_regex = "^([0-9a-fA-F]+)\\s+<([^.0-9][0-9a-zA-Z_\\.]+)>:";
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$mcount_regex = "^\\s*([0-9a-fA-F]+):\\sR_RISCV_CALL(_PLT)?\\s_?mcount\$";
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$mcount_regex = "^\\s*([0-9a-fA-F]+):\\sR_RISCV_CALL(_PLT)?\\s_mcount\$";
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$type = ".quad";
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$alignment = 2;
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} elsif ($arch eq "csky") {
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