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From:   Nicholas Piggin <npiggin@gmail.com>
To:     linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc:     Nicholas Piggin <npiggin@gmail.com>, linux-kernel@vger.kernel.org,
        linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
        Christoph Hellwig <hch@infradead.org>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Rick Edgecombe <rick.p.edgecombe@intel.com>,
        Ding Tianhong <dingtianhong@huawei.com>,
        Christoph Hellwig <hch@lst.de>
Subject: [PATCH v11 11/13] mm/vmalloc: add vmap_range_noflush variant
Date:   Tue, 26 Jan 2021 14:45:08 +1000
Message-Id: <20210126044510.2491820-12-npiggin@gmail.com>
In-Reply-To: <20210126044510.2491820-1-npiggin@gmail.com>
References: <20210126044510.2491820-1-npiggin@gmail.com>
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As a side-effect, the order of flush_cache_vmap() and
arch_sync_kernel_mappings() calls are switched, but that now matches
the other callers in this file.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 mm/vmalloc.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f043386bb51d..47ab4338cfff 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -240,7 +240,7 @@ static int vmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end,
 	return 0;
 }
 
-int vmap_range(unsigned long addr, unsigned long end,
+static int vmap_range_noflush(unsigned long addr, unsigned long end,
 			phys_addr_t phys_addr, pgprot_t prot,
 			unsigned int max_page_shift)
 {
@@ -263,14 +263,24 @@ int vmap_range(unsigned long addr, unsigned long end,
 			break;
 	} while (pgd++, phys_addr += (next - addr), addr = next, addr != end);
 
-	flush_cache_vmap(start, end);
-
 	if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
 		arch_sync_kernel_mappings(start, end);
 
 	return err;
 }
 
+int vmap_range(unsigned long addr, unsigned long end,
+			phys_addr_t phys_addr, pgprot_t prot,
+			unsigned int max_page_shift)
+{
+	int err;
+
+	err = vmap_range_noflush(addr, end, phys_addr, prot, max_page_shift);
+	flush_cache_vmap(addr, end);
+
+	return err;
+}
+
 static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 			     pgtbl_mod_mask *mask)
 {
-- 
2.23.0