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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>,
	x86@kernel.org, David Airlie <airlied@linux.ie>,
	Daniel Vetter <daniel@ffwll.ch>,
	Laura Abbott <labbott@redhat.com>,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
	Christophe Leroy <christophe.leroy@c-s.fr>,
	Peter Zijlstra <peterz@infradead.org>,
	linuxppc-dev@lists.ozlabs.org, linux-hyperv@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
	linux-arch@vger.kernel.org, linux-mm@kvack.org,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 12/29] mm: pass addr as unsigned long to vb_free
Date: Tue, 14 Apr 2020 15:13:31 +0200
Message-ID: <20200414131348.444715-13-hch@lst.de> (raw)
In-Reply-To: <20200414131348.444715-1-hch@lst.de>

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@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.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


  parent reply index

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-14 13:13 decruft the vmalloc API v2 Christoph Hellwig
2020-04-14 13:13 ` [PATCH 01/29] x86/hyperv: use vmalloc_exec for the hypercall page Christoph Hellwig
2020-04-14 13:13 ` [PATCH 02/29] x86: fix vmap arguments in map_irq_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 03/29] staging: android: ion: use vmap instead of vm_map_ram Christoph Hellwig
2020-04-14 13:13 ` [PATCH 04/29] staging: media: ipu3: use vmap instead of reimplementing it Christoph Hellwig
2020-04-23 10:32   ` Sakari Ailus
2020-04-14 13:13 ` [PATCH 05/29] dma-mapping: use vmap insted " Christoph Hellwig
2020-04-14 13:13 ` [PATCH 06/29] powerpc: add an ioremap_phb helper Christoph Hellwig
2020-04-14 13:13 ` [PATCH 07/29] powerpc: remove __ioremap_at and __iounmap_at Christoph Hellwig
2020-04-14 13:13 ` [PATCH 08/29] mm: remove __get_vm_area Christoph Hellwig
2020-04-14 13:13 ` [PATCH 09/29] mm: unexport unmap_kernel_range_noflush Christoph Hellwig
2020-04-14 13:13 ` [PATCH 10/29] mm: rename CONFIG_PGTABLE_MAPPING to CONFIG_ZSMALLOC_PGTABLE_MAPPING Christoph Hellwig
2020-04-14 13:13 ` [PATCH 11/29] mm: only allow page table mappings for built-in zsmalloc Christoph Hellwig
2020-04-16 20:43   ` Minchan Kim
2020-04-14 13:13 ` Christoph Hellwig [this message]
2020-04-14 13:13 ` [PATCH 13/29] mm: remove vmap_page_range_noflush and vunmap_page_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 14/29] mm: rename vmap_page_range to map_kernel_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 15/29] mm: don't return the number of pages from map_kernel_range{,_noflush} Christoph Hellwig
2020-04-14 13:13 ` [PATCH 16/29] mm: remove map_vm_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 17/29] mm: remove unmap_vmap_area Christoph Hellwig
2020-04-14 13:13 ` [PATCH 18/29] mm: remove the prot argument from vm_map_ram Christoph Hellwig
2020-04-14 13:13 ` [PATCH 19/29] mm: enforce that vmap can't map pages executable Christoph Hellwig
2020-04-14 13:13 ` [PATCH 20/29] gpu/drm: remove the powerpc hack in drm_legacy_sg_alloc Christoph Hellwig
2020-04-14 13:13 ` [PATCH 21/29] mm: remove the pgprot argument to __vmalloc Christoph Hellwig
2020-04-14 15:13   ` Wei Liu
     [not found]     ` <CAMeeMh8Q3Od76WaTasw+BpYVF58P-HQMaiFKHxXbZ_Q3tQPZ=A@mail.gmail.com>
2020-05-01  2:38       ` John Dorminy
2020-05-01 22:09         ` Andrew Morton
2020-04-14 13:13 ` [PATCH 22/29] mm: remove the prot argument to __vmalloc_node Christoph Hellwig
2020-04-14 13:13 ` [PATCH 23/29] mm: remove both instances of __vmalloc_node_flags Christoph Hellwig
2020-04-14 13:13 ` [PATCH 24/29] mm: remove __vmalloc_node_flags_caller Christoph Hellwig
2020-04-20  9:27   ` Geert Uytterhoeven
2020-04-14 13:13 ` [PATCH 25/29] mm: switch the test_vmalloc module to use __vmalloc_node Christoph Hellwig
2020-04-14 13:13 ` [PATCH 26/29] mm: remove vmalloc_user_node_flags Christoph Hellwig
2020-04-20  9:26   ` Geert Uytterhoeven
2020-04-14 13:13 ` [PATCH 27/29] arm64: use __vmalloc_node in arch_alloc_vmap_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 28/29] powerpc: use __vmalloc_node in alloc_vm_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 29/29] s390: use __vmalloc_node in stack_alloc Christoph Hellwig

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