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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-01-12 13:45:25 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-16 23:47:13 +1100 |
| commit | 5f356497c38448874f2d491cd214e9c283f5592d (patch) | |
| tree | e28807f19159c48b88ad504788b7f294b857a0f7 /arch/powerpc/include/asm/nohash | |
| parent | cd99ddbea250ee79027df6c469f51ad9e5452738 (diff) | |
| download | blackbird-op-linux-5f356497c38448874f2d491cd214e9c283f5592d.tar.gz blackbird-op-linux-5f356497c38448874f2d491cd214e9c283f5592d.zip | |
powerpc/8xx: remove unused _PAGE_WRITETHRU
_PAGE_WRITETHRU is only used in:
* AMIGA_Z2RAM block driver which is never activated on powerPC
* Video/FB driver which is for PPC_PMAC
Therefore, no need to spend time in 8xx TLB miss handlers for
handling it.
And by removing it, we free up bit 20 which then avoids having
to clear it on each TLB miss.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/nohash')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/32/pte-8xx.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/nohash/pgtable.h | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/nohash/32/pte-8xx.h b/arch/powerpc/include/asm/nohash/32/pte-8xx.h index 6dc0180fd5c7..19a5ecaef265 100644 --- a/arch/powerpc/include/asm/nohash/32/pte-8xx.h +++ b/arch/powerpc/include/asm/nohash/32/pte-8xx.h @@ -41,8 +41,7 @@ #define _PAGE_GUARDED 0x0010 /* Copied to L1 G entry in DTLB */ #define _PAGE_USER 0x0020 /* Copied to L1 APG lsb */ #define _PAGE_EXEC 0x0040 /* Copied to L1 APG */ -#define _PAGE_WRITETHRU 0x0080 /* software: caching is write through */ -#define _PAGE_ACCESSED 0x0800 /* software: page referenced */ +#define _PAGE_ACCESSED 0x0080 /* software: page referenced */ #define _PAGE_RO 0x0600 /* Supervisor RO, User no access */ diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h index fc4376c8d444..e0864e683cf9 100644 --- a/arch/powerpc/include/asm/nohash/pgtable.h +++ b/arch/powerpc/include/asm/nohash/pgtable.h @@ -235,8 +235,10 @@ extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addre #define pgprot_cached(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \ _PAGE_COHERENT)) +#if _PAGE_WRITETHRU != 0 #define pgprot_cached_wthru(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \ _PAGE_COHERENT | _PAGE_WRITETHRU)) +#endif #define pgprot_cached_noncoherent(prot) \ (__pgprot(pgprot_val(prot) & ~_PAGE_CACHE_CTL)) |
