linux-kernel - [PATCH 12/29] mm: pass addr as unsigned long to vb

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Message-Id: <20200414131348.444715-13-hch@lst.de>
Date:   Tue, 14 Apr 2020 15:13:31 +0200
From:   Christoph Hellwig <hch@....de>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, x86@...nel.org,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Laura Abbott <labbott@...hat.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>
Cc:     Robin Murphy <robin.murphy@....com>,
        Christophe Leroy <christophe.leroy@....fr>,
        Peter Zijlstra <peterz@...radead.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-hyperv@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-s390@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 12/29] mm: pass addr as unsigned long to vb_free

Ever use of addr in vb_free casts to unsigned long first, and the caller
has an unsigned long version of the address available anyway.  Just pass
that and avoid all the casts.

Signed-off-by: Christoph Hellwig <hch@....de>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 mm/vmalloc.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9183fc0d365a..aada9e9144bd 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1664,7 +1664,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask)
 	return vaddr;
 }
 
-static void vb_free(const void *addr, unsigned long size)
+static void vb_free(unsigned long addr, unsigned long size)
 {
 	unsigned long offset;
 	unsigned long vb_idx;
@@ -1674,24 +1674,22 @@ static void vb_free(const void *addr, unsigned long size)
 	BUG_ON(offset_in_page(size));
 	BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
 
-	flush_cache_vunmap((unsigned long)addr, (unsigned long)addr + size);
+	flush_cache_vunmap(addr, addr + size);
 
 	order = get_order(size);
 
-	offset = (unsigned long)addr & (VMAP_BLOCK_SIZE - 1);
-	offset >>= PAGE_SHIFT;
+	offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
 
-	vb_idx = addr_to_vb_idx((unsigned long)addr);
+	vb_idx = addr_to_vb_idx(addr);
 	rcu_read_lock();
 	vb = radix_tree_lookup(&vmap_block_tree, vb_idx);
 	rcu_read_unlock();
 	BUG_ON(!vb);
 
-	vunmap_page_range((unsigned long)addr, (unsigned long)addr + size);
+	vunmap_page_range(addr, addr + size);
 
 	if (debug_pagealloc_enabled_static())
-		flush_tlb_kernel_range((unsigned long)addr,
-					(unsigned long)addr + size);
+		flush_tlb_kernel_range(addr, addr + size);
 
 	spin_lock(&vb->lock);
 
@@ -1791,7 +1789,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
 
 	if (likely(count <= VMAP_MAX_ALLOC)) {
 		debug_check_no_locks_freed(mem, size);
-		vb_free(mem, size);
+		vb_free(addr, size);
 		return;
 	}
 
-- 
2.25.1