In commit 034ff37d3407 ("x86: rewrite '__copy_user_nocache' function"),
rewrited __copy_user_nocache() uses EX_TYPE_UACCESS instead of
EX_TYPE_COPY，this change does not broken the MC safe copy for
__copy_user_nocache(), but as a result, there's no place for EX_TYPE_COPY
to use. Therefore, we remove the definition of EX_TYPE_COPY.
Signed-off-by: Tong Tiangen <tongtiangen@xxxxxxxxxx>
---
arch/x86/include/asm/asm.h | 3 ---
arch/x86/include/asm/extable_fixup_types.h | 23 +++++++++++-----------
arch/x86/kernel/cpu/mce/severity.c | 1 -
arch/x86/mm/extable.c | 9 ---------
4 files changed, 11 insertions(+), 25 deletions(-)
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index fbcfec4dc4cc..692409ea0c37 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -215,9 +215,6 @@ register unsigned long current_stack_pointer asm(_ASM_SP);
#define _ASM_EXTABLE_UA(from, to) \
_ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS)
-#define _ASM_EXTABLE_CPY(from, to) \
- _ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY)
-
#define _ASM_EXTABLE_FAULT(from, to) \
_ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT)
diff --git a/arch/x86/include/asm/extable_fixup_types.h b/arch/x86/include/asm/extable_fixup_types.h
index fe6312045042..787916ec1e12 100644
--- a/arch/x86/include/asm/extable_fixup_types.h
+++ b/arch/x86/include/asm/extable_fixup_types.h
@@ -36,18 +36,17 @@
#define EX_TYPE_DEFAULT 1
#define EX_TYPE_FAULT 2
#define EX_TYPE_UACCESS 3
-#define EX_TYPE_COPY 4
-#define EX_TYPE_CLEAR_FS 5
-#define EX_TYPE_FPU_RESTORE 6
-#define EX_TYPE_BPF 7
-#define EX_TYPE_WRMSR 8
-#define EX_TYPE_RDMSR 9
-#define EX_TYPE_WRMSR_SAFE 10 /* reg := -EIO */
-#define EX_TYPE_RDMSR_SAFE 11 /* reg := -EIO */
-#define EX_TYPE_WRMSR_IN_MCE 12
-#define EX_TYPE_RDMSR_IN_MCE 13
-#define EX_TYPE_DEFAULT_MCE_SAFE 14
-#define EX_TYPE_FAULT_MCE_SAFE 15
+#define EX_TYPE_CLEAR_FS 4
+#define EX_TYPE_FPU_RESTORE 5
+#define EX_TYPE_BPF 6
+#define EX_TYPE_WRMSR 7
+#define EX_TYPE_RDMSR 8
+#define EX_TYPE_WRMSR_SAFE 9 /* reg := -EIO */
+#define EX_TYPE_RDMSR_SAFE 10 /* reg := -EIO */
+#define EX_TYPE_WRMSR_IN_MCE 11
+#define EX_TYPE_RDMSR_IN_MCE 12
+#define EX_TYPE_DEFAULT_MCE_SAFE 13
+#define EX_TYPE_FAULT_MCE_SAFE 14
#define EX_TYPE_POP_REG 16 /* sp += sizeof(long) */
#define EX_TYPE_POP_ZERO (EX_TYPE_POP_REG | EX_DATA_IMM(0))
diff --git a/arch/x86/kernel/cpu/mce/severity.c b/arch/x86/kernel/cpu/mce/severity.c
index c4477162c07d..bca780fa5e57 100644
--- a/arch/x86/kernel/cpu/mce/severity.c
+++ b/arch/x86/kernel/cpu/mce/severity.c
@@ -290,7 +290,6 @@ static noinstr int error_context(struct mce *m, struct pt_regs *regs)
switch (fixup_type) {
case EX_TYPE_UACCESS:
- case EX_TYPE_COPY:
if (!copy_user)
return IN_KERNEL;
m->kflags |= MCE_IN_KERNEL_COPYIN;
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index 271dcb2deabc..2354c0156e51 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -163,13 +163,6 @@ static bool ex_handler_uaccess(const struct exception_table_entry *fixup,
return ex_handler_default(fixup, regs);
}
-static bool ex_handler_copy(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr)
-{
- WARN_ONCE(trapnr == X86_TRAP_GP, "General protection fault in user access. Non-canonical address?");
- return ex_handler_fault(fixup, regs, trapnr);
-}
-
static bool ex_handler_msr(const struct exception_table_entry *fixup,
struct pt_regs *regs, bool wrmsr, bool safe, int reg)
{
@@ -267,8 +260,6 @@ int fixup_exception(struct pt_regs *regs, int trapnr, unsigned long error_code,
return ex_handler_fault(e, regs, trapnr);
case EX_TYPE_UACCESS:
return ex_handler_uaccess(e, regs, trapnr, fault_addr);
- case EX_TYPE_COPY:
- return ex_handler_copy(e, regs, trapnr);
case EX_TYPE_CLEAR_FS:
return ex_handler_clear_fs(e, regs);
case EX_TYPE_FPU_RESTORE:
--
2.25.1
