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authorLinus Walleij <linus.walleij@linaro.org>2022-06-30 11:41:21 +0300
committerakpm <akpm@linux-foundation.org>2022-07-18 03:14:36 +0300
commit259ecb34e2cd73811e250fc9c8d1f07df7bb2d14 (patch)
tree90badc1f95099071bfdb80d64677e3bc9eafbfc1 /mm/highmem.c
parentb3c56f8f2064ae1b73e099d23a82ae1642e435a1 (diff)
downloadlinux-259ecb34e2cd73811e250fc9c8d1f07df7bb2d14.tar.xz
mm/highmem: pass a pointer to virt_to_page()
Functions that work on a pointer to virtual memory such as virt_to_pfn() and users of that function such as virt_to_page() are supposed to pass a pointer to virtual memory, ideally a (void *) or other pointer. However since many architectures implement virt_to_pfn() as a macro, this function becomes polymorphic and accepts both a (unsigned long) and a (void *). If we instead implement a proper virt_to_pfn(void *addr) function the following happens (occurred on arch/arm): mm/highmem.c:153:29: warning: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion] We already have a proper void * pointer in the scope of this function named "vaddr" so pass that instead. Link: https://lkml.kernel.org/r/20220630084124.691207-3-linus.walleij@linaro.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/highmem.c')
-rw-r--r--mm/highmem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/highmem.c b/mm/highmem.c
index 1a692997fac4..e92a7ceb30e8 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -150,7 +150,7 @@ struct page *__kmap_to_page(void *vaddr)
return pte_page(pkmap_page_table[i]);
}
- return virt_to_page(addr);
+ return virt_to_page(vaddr);
}
EXPORT_SYMBOL(__kmap_to_page);