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xtensa: drop fast_syscall_kernel 

There must be no xtensa-specific syscalls from the kernel code: register
spilling uses call+entry sequence and atomics have proper function
implementations. Drop fast_syscall_xtensa.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2018-11-15 18:17:41 -08:00
parent 5eacadb5e6
commit 8ed3a5426b
2 changed files with 0 additions and 21 deletions
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19
arch/xtensa/kernel/entry.S
View File

@ -1022,25 +1022,6 @@ ENDPROC(fast_alloca)
* excsave_1: dispatch table
*/
ENTRY(fast_syscall_kernel)
/* Skip syscall. */
rsr a0, epc1
addi a0, a0, 3
wsr a0, epc1
l32i a0, a2, PT_DEPC
bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, fast_syscall_unrecoverable
rsr a0, depc # get syscall-nr
_beqz a0, fast_syscall_spill_registers
_beqi a0, __NR_xtensa, fast_syscall_xtensa
j kernel_exception
ENDPROC(fast_syscall_kernel)
ENTRY(fast_syscall_user)
/* Skip syscall. */

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

@ -51,7 +51,6 @@
extern void kernel_exception(void);
extern void user_exception(void);
extern void fast_syscall_kernel(void);
extern void fast_syscall_user(void);
extern void fast_alloca(void);
extern void fast_unaligned(void);
@ -89,7 +88,6 @@ typedef struct {
static dispatch_init_table_t __initdata dispatch_init_table[] = {
{ EXCCAUSE_ILLEGAL_INSTRUCTION, 0, do_illegal_instruction},
{ EXCCAUSE_SYSTEM_CALL, KRNL, fast_syscall_kernel },
{ EXCCAUSE_SYSTEM_CALL, USER, fast_syscall_user },
{ EXCCAUSE_SYSTEM_CALL, 0, system_call },
/* EXCCAUSE_INSTRUCTION_FETCH unhandled */