linux.git/scripts/coccinelle/api/alloc/alloc_cast.cocci, branch v7.3-rc2

coccinelle: alloc_cast: drop removed allocators

2026-08-23T20:12:11+00:00

- pci_alloc_consistent() and pci_zalloc_consistent() were removed by
  commit 7968778914e5
  ("PCI: Remove the deprecated "pci-dma-compat.h" API")

- kmem_alloc() was removed by commit f078d4ea8276
  ("xfs: convert kmem_alloc() to kmalloc()")

- kmem_zalloc() was removed by commit 10634530f7ba
  ("xfs: convert kmem_zalloc() to kzalloc()")

- kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit
  bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers")

So drop them from the rules.

No functional change.

Signed-off-by: Sang-Heon Jeon 
Signed-off-by: Julia Lawall

coccinelle: api: check for macro context

2026-08-23T20:12:10+00:00

A cast on a call to an allocation function that is the body of a macro can
be useful, as it ensures tha the macro is used for allocating objects of
the right type.  Add two new rules to ignore the macro case.

Suggested-by: Steven Rostedt 
Signed-off-by: Julia Lawall

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505

2019-06-19T15:11:22+00:00

Based on 1 normalized pattern(s):

  gplv2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 58 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Allison Randal 
Reviewed-by: Kate Stewart 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081207.556988620@linutronix.de
Signed-off-by: Greg Kroah-Hartman

dma-mapping: remove dma_zalloc_coherent()

2019-01-08T12:58:49+00:00

dma_zalloc_coherent() is no longer needed as it has no users because
dma_alloc_coherent() already zeroes out memory for us.

The Coccinelle grammar rule that used to check for dma_alloc_coherent()
+ memset() is modified so that it just tells the user that the memset is
not needed anymore.

Suggested-by: Christoph Hellwig 
Signed-off-by: Luis Chamberlain 
Signed-off-by: Christoph Hellwig

Coccinelle: alloc_cast: Add more memory allocating functions to the list

2018-01-16T14:38:53+00:00

Add more memory allocating functions that are frequently used in the
kernel code to the existing list and remove the useless casts where
it is unnecessary.

But preserve those casts having __attribute__ such as __force, __iomem,
etc. which are used by Sparse in the static analysis of the code.

Also remove two blank lines at EOF.

Signed-off-by: Himanshu Jha 
Acked-by: Julia Lawall 
Signed-off-by: Masahiro Yamada

Coccinelle: Script to detect cast after memory allocation

2014-08-06T10:10:17+00:00

This script detects cases of use of cast for the value returned by
kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
the cast as it is not useful. This Coccinelle script replaces
drop_kmalloc_cast.cocci as it removes the casting in more limited
cases of kmalloc, kzalloc and kcalloc.

Signed-off-by: Himangi Saraogi 
Acked-by: Julia Lawall 
Signed-off-by: Michal Marek