powerpc: Remove unnecessary condition when sanity-checking WIMG bits

It is okay for both _PAGE_GUARDED and _PAGE_COHERENT (G and M) to be set
in the same pte.  In fact, even if that were not the case, there doesn't
seem to be any place where G is set without also setting I (_PAGE_NO_CACHE),
so the test for I is sufficient as a condition to clear _PAGE_COHERENT
when filling the hash table.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 3 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/cell/beat_htab.c b/arch/powerpc/platforms/cell/beat_htab.c
index 81467ff055c8..2e67bd840e01 100644
--- a/arch/powerpc/platforms/cell/beat_htab.c
+++ b/arch/powerpc/platforms/cell/beat_htab.c
@@ -112,7 +112,7 @@ static long beat_lpar_hpte_insert(unsigned long hpte_group,
         if (!(vflags & HPTE_V_BOLTED))
                 DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
 
-        if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
+        if (rflags & _PAGE_NO_CACHE)
                 hpte_r &= ~_PAGE_COHERENT;
 
         spin_lock(&beat_htab_lock);
@@ -334,7 +334,7 @@ static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
         if (!(vflags & HPTE_V_BOLTED))
                 DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
 
-        if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
+        if (rflags & _PAGE_NO_CACHE)
                 hpte_r &= ~_PAGE_COHERENT;
 
         /* insert into not-volted entry */
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 38b5927b3629..52a80e5840e8 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -305,8 +305,7 @@ static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
         flags = 0;
 
         /* Make pHyp happy */
-        if ((rflags & _PAGE_GUARDED) ||
-            ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)))
+        if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU))
                 hpte_r &= ~_PAGE_COHERENT;
 
         lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);