Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm

[pandora-kernel.git] / arch / arm / kernel / entry-common.S

diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 8c3de1a..807cfeb 100644 (file)
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -33,14 +33,7 @@ ret_fast_syscall:
        /* perform architecture specific actions before user return */
        arch_ret_to_user r1, lr
 
-       @ fast_restore_user_regs
-       ldr     r1, [sp, #S_OFF + S_PSR]        @ get calling cpsr
-       ldr     lr, [sp, #S_OFF + S_PC]!        @ get pc
-       msr     spsr_cxsf, r1                   @ save in spsr_svc
-       ldmdb   sp, {r1 - lr}^                  @ get calling r1 - lr
-       mov     r0, r0
-       add     sp, sp, #S_FRAME_SIZE - S_PC
-       movs    pc, lr                          @ return & move spsr_svc into cpsr
+       restore_user_regs fast = 1, offset = S_OFF
  UNWIND(.fnend         )
 
 /*
@@ -51,7 +44,7 @@ fast_work_pending:
 work_pending:
        tst     r1, #_TIF_NEED_RESCHED
        bne     work_resched
-       tst     r1, #_TIF_SIGPENDING
+       tst     r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME
        beq     no_work_pending
        mov     r0, sp                          @ 'regs'
        mov     r2, why                         @ 'syscall'
@@ -73,14 +66,7 @@ no_work_pending:
        /* perform architecture specific actions before user return */
        arch_ret_to_user r1, lr
 
-       @ slow_restore_user_regs
-       ldr     r1, [sp, #S_PSR]                @ get calling cpsr
-       ldr     lr, [sp, #S_PC]!                @ get pc
-       msr     spsr_cxsf, r1                   @ save in spsr_svc
-       ldmdb   sp, {r0 - lr}^                  @ get calling r0 - lr
-       mov     r0, r0
-       add     sp, sp, #S_FRAME_SIZE - S_PC
-       movs    pc, lr                          @ return & move spsr_svc into cpsr
+       restore_user_regs fast = 0, offset = 0
 ENDPROC(ret_to_user)
 
 /*
@@ -132,6 +118,25 @@ ftrace_call:
 
 #else
 
+ENTRY(__gnu_mcount_nc)
+       stmdb sp!, {r0-r3, lr}
+       ldr r0, =ftrace_trace_function
+       ldr r2, [r0]
+       adr r0, ftrace_stub
+       cmp r0, r2
+       bne gnu_trace
+       ldmia sp!, {r0-r3, ip, lr}
+       bx ip
+
+gnu_trace:
+       ldr r1, [sp, #20]                       @ lr of instrumented routine
+       mov r0, lr
+       sub r0, r0, #MCOUNT_INSN_SIZE
+       mov lr, pc
+       mov pc, r2
+       ldmia sp!, {r0-r3, ip, lr}
+       bx ip
+
 ENTRY(mcount)
        stmdb sp!, {r0-r3, lr}
        ldr r0, =ftrace_trace_function
@@ -182,8 +187,10 @@ ftrace_stub:
 ENTRY(vector_swi)
        sub     sp, sp, #S_FRAME_SIZE
        stmia   sp, {r0 - r12}                  @ Calling r0 - r12
-       add     r8, sp, #S_PC
-       stmdb   r8, {sp, lr}^                   @ Calling sp, lr
+ ARM(  add     r8, sp, #S_PC           )
+ ARM(  stmdb   r8, {sp, lr}^           )       @ Calling sp, lr
+ THUMB(        mov     r8, sp                  )
+ THUMB(        store_user_sp_lr r8, r10, S_SP  )       @ calling sp, lr
        mrs     r8, spsr                        @ called from non-FIQ mode, so ok.
        str     lr, [sp, #S_PC]                 @ Save calling PC
        str     r8, [sp, #S_PSR]                @ Save CPSR
@@ -272,7 +279,7 @@ ENTRY(vector_swi)
        bne     __sys_trace
 
        cmp     scno, #NR_syscalls              @ check upper syscall limit
-       adr     lr, ret_fast_syscall            @ return address
+       adr     lr, BSYM(ret_fast_syscall)      @ return address
        ldrcc   pc, [tbl, scno, lsl #2]         @ call sys_* routine
 
        add     r1, sp, #S_OFF
@@ -293,7 +300,7 @@ __sys_trace:
        mov     r0, #0                          @ trace entry [IP = 0]
        bl      syscall_trace
 
-       adr     lr, __sys_trace_return          @ return address
+       adr     lr, BSYM(__sys_trace_return)    @ return address
        mov     scno, r0                        @ syscall number (possibly new)
        add     r1, sp, #S_R0 + S_OFF           @ pointer to regs
        cmp     scno, #NR_syscalls              @ check upper syscall limit
@@ -373,16 +380,6 @@ sys_clone_wrapper:
                b       sys_clone
 ENDPROC(sys_clone_wrapper)
 
-sys_sigsuspend_wrapper:
-               add     r3, sp, #S_OFF
-               b       sys_sigsuspend
-ENDPROC(sys_sigsuspend_wrapper)
-
-sys_rt_sigsuspend_wrapper:
-               add     r2, sp, #S_OFF
-               b       sys_rt_sigsuspend
-ENDPROC(sys_rt_sigsuspend_wrapper)
-
 sys_sigreturn_wrapper:
                add     r0, sp, #S_OFF
                b       sys_sigreturn