[MIPS] Fix 32-bit kernel by replacing 64-bit-only code.

dclz() expects its 64-bit argument being passed as a single register
but on 32-bit kernels it'll actually be in a register pair.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 3 insertions, 33 deletions

diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index ed325f0ab28a..a0222fa4416c 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -469,21 +469,6 @@ void bcm1480_kgdb_interrupt(struct pt_regs *regs)
 
 #endif  /* CONFIG_KGDB */
 
-static inline int dclz(unsigned long long x)
-{
-        int lz;
-
-        __asm__ (
-        "       .set    push                                            \n"
-        "       .set    mips64                                          \n"
-        "       dclz    %0, %1                                          \n"
-        "       .set    pop                                             \n"
-        : "=r" (lz)
-        : "r" (x));
-
-        return lz;
-}
-
 extern void bcm1480_timer_interrupt(struct pt_regs *regs);
 extern void bcm1480_mailbox_interrupt(struct pt_regs *regs);
 extern void bcm1480_kgdb_interrupt(struct pt_regs *regs);
@@ -536,9 +521,9 @@ asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
 
                 if (mask_h) {
                         if (mask_h ^ 1)
-                                do_IRQ(63 - dclz(mask_h), regs);
+                                do_IRQ(fls64(mask_h) - 1, regs);
                         else
-                                do_IRQ(127 - dclz(mask_l), regs);
+                                do_IRQ(63 + fls64(mask_l), regs);
                 }
         }
 }
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index 1de71adec6c6..a451b4c7732d 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -419,21 +419,6 @@ static void sb1250_kgdb_interrupt(struct pt_regs *regs)
 
 #endif  /* CONFIG_KGDB */
 
-static inline int dclz(unsigned long long x)
-{
-        int lz;
-
-        __asm__ (
-        "       .set    push                                            \n"
-        "       .set    mips64                                          \n"
-        "       dclz    %0, %1                                          \n"
-        "       .set    pop                                             \n"
-        : "=r" (lz)
-        : "r" (x));
-
-        return lz;
-}
-
 extern void sb1250_timer_interrupt(struct pt_regs *regs);
 extern void sb1250_mailbox_interrupt(struct pt_regs *regs);
 extern void sb1250_kgdb_interrupt(struct pt_regs *regs);
@@ -490,6 +475,6 @@ asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
                 mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(),
                                               R_IMR_INTERRUPT_STATUS_BASE)));
                 if (mask)
-                        do_IRQ(63 - dclz(mask), regs);
+                        do_IRQ(fls64(mask) - 1, regs);
         }
 }