[POWERPC] Clean up access to thread_info in assembly

Use (31-THREAD_SHIFT) to get to thread_info from stack pointer.  This makes
the code a bit easier to read and more robust if we ever change THREAD_SHIFT.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 9d2c566..92ccc6f 100644 (file)
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -152,7 +152,7 @@ _GLOBAL(low_choose_750fx_pll)
        mtspr   SPRN_HID1,r4
 
        /* Store new HID1 image */
-       rlwinm  r6,r1,0,0,18
+       rlwinm  r6,r1,0,0,(31-THREAD_SHIFT)
        lwz     r6,TI_CPU(r6)
        slwi    r6,r6,2
        addis   r6,r6,nap_save_hid1@ha
@@ -281,7 +281,7 @@ _GLOBAL(_tlbia)
 #endif /* CONFIG_SMP */
 #else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
 #if defined(CONFIG_SMP)
-       rlwinm  r8,r1,0,0,18
+       rlwinm  r8,r1,0,0,(31-THREAD_SHIFT)
        lwz     r8,TI_CPU(r8)
        oris    r8,r8,10
        mfmsr   r10
@@ -377,7 +377,7 @@ _GLOBAL(_tlbie)
 #endif /* CONFIG_SMP */
 #else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
 #if defined(CONFIG_SMP)
-       rlwinm  r8,r1,0,0,18
+       rlwinm  r8,r1,0,0,(31-THREAD_SHIFT)
        lwz     r8,TI_CPU(r8)
        oris    r8,r8,11
        mfmsr   r10

diff --git a/arch/powerpc/mm/hash_low_32.S b/arch/powerpc/mm/hash_low_32.S
index e10d76a..ddeaf9e 100644 (file)
--- a/arch/powerpc/mm/hash_low_32.S
+++ b/arch/powerpc/mm/hash_low_32.S
@@ -191,7 +191,7 @@ _GLOBAL(add_hash_page)
        add     r3,r3,r0                /* note create_hpte trims to 24 bits */
 
 #ifdef CONFIG_SMP
-       rlwinm  r8,r1,0,0,18            /* use cpu number to make tag */
+       rlwinm  r8,r1,0,0,(31-THREAD_SHIFT) /* use cpu number to make tag */
        lwz     r8,TI_CPU(r8)           /* to go in mmu_hash_lock */
        oris    r8,r8,12
 #endif /* CONFIG_SMP */
@@ -526,7 +526,7 @@ _GLOBAL(flush_hash_pages)
 #ifdef CONFIG_SMP
        addis   r9,r7,mmu_hash_lock@ha
        addi    r9,r9,mmu_hash_lock@l
-       rlwinm  r8,r1,0,0,18
+       rlwinm  r8,r1,0,0,(31-THREAD_SHIFT)
        add     r8,r8,r7
        lwz     r8,TI_CPU(r8)
        oris    r8,r8,9