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| author | Chris Packham <chris.packham@alliedtelesis.co.nz> | 2019-10-25 08:50:16 +1300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2019-10-29 04:45:40 -0600 |
| commit | 1c16b3d58681b583157a1b74c4c4dd96a08f5931 (patch) | |
| tree | 7d6cbcc5cc8712cd9b1208fcc5abd0a8de5e5d84 /Documentation/core-api | |
| parent | 094ef1c9fbeac0e4404d66a053ace6d909386507 (diff) | |
| download | linux-1c16b3d58681b583157a1b74c4c4dd96a08f5931.tar.bz2 | |
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 <chris.packham@alliedtelesis.co.nz>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/core-api')
| -rw-r--r-- | Documentation/core-api/memory-allocation.rst | 3 |
1 files changed, 2 insertions, 1 deletions
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 |