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@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Gao Xiang <xiang@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Kelley <mikelley@microsoft.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/20200414131348.444715-13-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d4c1322..edb95da 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1665,7 +1665,7 @@ 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;
@@ -1675,24 +1675,22 @@ 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);
 
@@ -1792,7 +1790,7 @@ 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;
        }