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xtensa: drop unused members of struct thread_struct 

bad_vaddr, bad_uaddr and error_code fields are set but never read by the
xtensa arch-specific code. Drop them. Also drop the commented out info
field.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2023-01-06 23:30:57 -08:00
parent 5b24ac2dfd
commit 4414c1f5c7
3 changed files with 0 additions and 15 deletions
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9
arch/xtensa/include/asm/processor.h
View File

@ -154,11 +154,6 @@ struct thread_struct {
unsigned long ra; /* kernel's a0: return address and window call size */
unsigned long sp; /* kernel's a1: stack pointer */
/* struct xtensa_cpuinfo info; */
unsigned long bad_vaddr; /* last user fault */
unsigned long bad_uaddr; /* last kernel fault accessing user space */
unsigned long error_code;
#ifdef CONFIG_HAVE_HW_BREAKPOINT
struct perf_event *ptrace_bp[XCHAL_NUM_IBREAK];
struct perf_event *ptrace_wp[XCHAL_NUM_DBREAK];
@ -176,10 +171,6 @@ struct thread_struct {
{ \
ra: 0, \
sp: sizeof(init_stack) + (long) &init_stack, \
/*info: {0}, */ \
bad_vaddr: 0, \
bad_uaddr: 0, \
error_code: 0, \
}

2
arch/xtensa/kernel/traps.c
View File

@ -362,8 +362,6 @@ static void do_unaligned_user(struct pt_regs *regs)
__die_if_kernel("Unhandled unaligned exception in kernel",
regs, SIGKILL);
current->thread.bad_vaddr = regs->excvaddr;
current->thread.error_code = -3;
pr_info_ratelimited("Unaligned memory access to %08lx in '%s' "
"(pid = %d, pc = %#010lx)\n",
regs->excvaddr, current->comm,

4
arch/xtensa/mm/fault.c
View File

@ -206,8 +206,6 @@ good_area:
bad_area:
mmap_read_unlock(mm);
if (user_mode(regs)) {
current->thread.bad_vaddr = address;
current->thread.error_code = is_write;
force_sig_fault(SIGSEGV, code, (void *) address);
return;
}
@ -232,7 +230,6 @@ do_sigbus:
/* Send a sigbus, regardless of whether we were in kernel
* or user mode.
*/
current->thread.bad_vaddr = address;
force_sig_fault(SIGBUS, BUS_ADRERR, (void *) address);
/* Kernel mode? Handle exceptions or die */
@ -252,7 +249,6 @@ bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
if ((entry = search_exception_tables(regs->pc)) != NULL) {
pr_debug("%s: Exception at pc=%#010lx (%lx)\n",
current->comm, regs->pc, entry->fixup);
current->thread.bad_uaddr = address;
regs->pc = entry->fixup;
return;
}