From 1c16b3d58681b583157a1b74c4c4dd96a08f5931 Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Fri, 25 Oct 2019 08:50:16 +1300 Subject: docs/core-api: memory-allocation: mention size helpers Mention struct_size(), array_size() and array3_size() in the same place as kmalloc() and friends. Signed-off-by: Chris Packham Acked-by: Mike Rapoport Reviewed-by: Matthew Wilcox (Oracle) Signed-off-by: Jonathan Corbet --- Documentation/core-api/memory-allocation.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation/core-api') diff --git a/Documentation/core-api/memory-allocation.rst b/Documentation/core-api/memory-allocation.rst index e47d48655085..4aa82ddd01b8 100644 --- a/Documentation/core-api/memory-allocation.rst +++ b/Documentation/core-api/memory-allocation.rst @@ -91,7 +91,8 @@ The most straightforward way to allocate memory is to use a function from the kmalloc() family. And, to be on the safe side it's best to use routines that set memory to zero, like kzalloc(). If you need to allocate memory for an array, there are kmalloc_array() and kcalloc() -helpers. +helpers. The helpers struct_size(), array_size() and array3_size() can +be used to safely calculate object sizes without overflowing. The maximal size of a chunk that can be allocated with `kmalloc` is limited. The actual limit depends on the hardware and the kernel -- cgit v1.2.3