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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-09-28 09:29:22 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-11-24 15:31:48 +0300 |
| commit | 0b4721815c5328e08c3acdee4a53890e012d830b (patch) | |
| tree | af635473cf28efb9e983358ac3f95941b3f90b2a /arch/powerpc/include/asm/nohash | |
| parent | f2c45962cc618c12f69fd46e6ebc20b9cd7f15ac (diff) | |
| download | linux-0b4721815c5328e08c3acdee4a53890e012d830b.tar.xz | |
powerpc/8xx: Reverse order entries are written by __set_pte_at()
At the time being, with 16k pages __set_pte_at() writes table entries
in reverse order:
294: 91 49 00 0c stw r10,12(r9)
298: 91 49 00 08 stw r10,8(r9)
29c: 91 49 00 04 stw r10,4(r9)
2a0: 91 49 00 00 stw r10,0(r9)
Allthough there should be no impact at all as it stays in a single
cacheline, reverse the writing in a more natural order.
288: 91 49 00 0c stw r10,0(r9)
28c: 91 49 00 08 stw r10,4(r9)
290: 91 49 00 04 stw r10,8(r9)
294: 91 49 00 00 stw r10,12(r9)
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/67c3b5d44edfec054234ea9b4d05fc4b4f7f8a0e.1664346554.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/nohash')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h index d9067dfc531c..69c3a050a3d8 100644 --- a/arch/powerpc/include/asm/nohash/pgtable.h +++ b/arch/powerpc/include/asm/nohash/pgtable.h @@ -183,7 +183,7 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, * cases, and 32-bit non-hash with 32-bit PTEs. */ #if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES) - ptep->pte = ptep->pte1 = ptep->pte2 = ptep->pte3 = pte_val(pte); + ptep->pte3 = ptep->pte2 = ptep->pte1 = ptep->pte = pte_val(pte); #else *ptep = pte; #endif |