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Miller" , sparclinux@vger.kernel.org, Paul Cercueil , Thomas Bogendoerfer , Michael Ellerman , linuxppc-dev@lists.ozlabs.org Subject: [patch 2/4] mm/highmem: Prepare for overriding set_pte_at() References: <20210112170136.078559026@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The generic kmap_local() map function uses set_pte_at(), but MIPS requires set_pte() and PowerPC wants __set_pte_at(). Provide arch_kmap_local_set_pte() and default it to set_pte_at(). Signed-off-by: Thomas Gleixner --- mm/highmem.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/mm/highmem.c +++ b/mm/highmem.c @@ -473,6 +473,11 @@ static inline void *arch_kmap_local_high } #endif +#ifndef arch_kmap_local_set_pte +#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev) \ + set_pte_at(mm, vaddr, ptep, ptev) +#endif + /* Unmap a local mapping which was obtained by kmap_high_get() */ static inline bool kmap_high_unmap_local(unsigned long vaddr) { @@ -515,7 +520,7 @@ void *__kmap_local_pfn_prot(unsigned lon vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); BUG_ON(!pte_none(*(kmap_pte - idx))); pteval = pfn_pte(pfn, prot); - set_pte_at(&init_mm, vaddr, kmap_pte - idx, pteval); + arch_kmap_local_set_pte(&init_mm, vaddr, kmap_pte - idx, pteval); arch_kmap_local_post_map(vaddr, pteval); current->kmap_ctrl.pteval[kmap_local_idx()] = pteval; preempt_enable();