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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2008-07-10 01:28:07 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 12:24:59 +1000 |
| commit | 443dcac4d89622cbfc61f53523007979879d6f8e (patch) | |
| tree | 8cf25bd652135b0079a9e73f79095434c70906c4 /arch/powerpc | |
| parent | 0f47331475201c7785454030a9976c8ac902a35d (diff) | |
| download | linux-443dcac4d89622cbfc61f53523007979879d6f8e.tar.bz2 | |
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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/cell/beat_htab.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 3 |
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); |