diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-10 23:50:59 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-11 21:40:13 -0400 |
| commit | cb450766bcafc7bd7d40e9a5a0050745e8c68b3e (patch) | |
| tree | d7a4f46dd68db4e9d20ad69b52b505c1c49fbfdd /arch/alpha/kernel/entry.S | |
| parent | d9d0738a898dd26a417d00a6923eef1015d33735 (diff) | |
alpha: get rid of switch_stack argument of do_work_pending()
... and now the asm glue side of that.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/alpha/kernel/entry.S')
| -rw-r--r-- | arch/alpha/kernel/entry.S | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S index 0c30ccea929..16e074f9e58 100644 --- a/arch/alpha/kernel/entry.S +++ b/arch/alpha/kernel/entry.S @@ -311,7 +311,7 @@ entSys: .align 4 ret_from_sys_call: - cmovne $26, 0, $19 /* $19 = 0 => non-restartable */ + cmovne $26, 0, $18 /* $18 = 0 => non-restartable */ ldq $0, SP_OFF($sp) and $0, 8, $0 beq $0, ret_to_kernel @@ -320,8 +320,8 @@ ret_to_user: sampling and the rti. */ lda $16, 7 call_pal PAL_swpipl - ldl $5, TI_FLAGS($8) - and $5, _TIF_WORK_MASK, $2 + ldl $17, TI_FLAGS($8) + and $17, _TIF_WORK_MASK, $2 bne $2, work_pending restore_all: RESTORE_ALL @@ -341,10 +341,10 @@ $syscall_error: * frame to indicate that a negative return value wasn't an * error number.. */ - ldq $19, 0($sp) /* old syscall nr (zero if success) */ - beq $19, $ret_success + ldq $18, 0($sp) /* old syscall nr (zero if success) */ + beq $18, $ret_success - ldq $20, 72($sp) /* .. and this a3 */ + ldq $19, 72($sp) /* .. and this a3 */ subq $31, $0, $0 /* with error in v0 */ addq $31, 1, $1 /* set a3 for errno return */ stq $0, 0($sp) @@ -362,34 +362,32 @@ $ret_success: * Do all cleanup when returning from all interrupts and system calls. * * Arguments: - * $5: TI_FLAGS. * $8: current. - * $19: The old syscall number, or zero if this is not a return + * $17: TI_FLAGS. + * $18: The old syscall number, or zero if this is not a return * from a syscall that errored and is possibly restartable. - * $20: The old a3 value + * $19: The old a3 value */ .align 4 .ent work_pending work_pending: - and $5, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2 + and $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2 bne $2, $work_notifysig $work_resched: /* * We can get here only if we returned from syscall without SIGPENDING * or got through work_notifysig already. Either case means no syscall - * restarts for us, so let $19 and $20 burn. + * restarts for us, so let $18 and $19 burn. */ jsr $26, schedule - mov 0, $19 + mov 0, $18 br ret_to_user $work_notifysig: mov $sp, $16 bsr $1, do_switch_stack - mov $sp, $17 - mov $5, $18 jsr $26, do_work_pending bsr $1, undo_switch_stack br restore_all @@ -440,9 +438,9 @@ $strace_success: .align 3 $strace_error: - ldq $19, 0($sp) /* old syscall nr (zero if success) */ - beq $19, $strace_success - ldq $20, 72($sp) /* .. and this a3 */ + ldq $18, 0($sp) /* old syscall nr (zero if success) */ + beq $18, $strace_success + ldq $19, 72($sp) /* .. and this a3 */ subq $31, $0, $0 /* with error in v0 */ addq $31, 1, $1 /* set a3 for errno return */ @@ -450,11 +448,11 @@ $strace_error: stq $1, 72($sp) /* a3 for return */ bsr $1, do_switch_stack - mov $19, $9 /* save old syscall number */ - mov $20, $10 /* save old a3 */ + mov $18, $9 /* save old syscall number */ + mov $19, $10 /* save old a3 */ jsr $26, syscall_trace_leave - mov $9, $19 - mov $10, $20 + mov $9, $18 + mov $10, $19 bsr $1, undo_switch_stack mov $31, $26 /* tell "ret_from_sys_call" we can restart */ |