scripts/coccinelle/locks/call_kern.cocci

Source file repositories/reference/linux-study-clean/scripts/coccinelle/locks/call_kern.cocci

File Facts

System
Linux kernel
Corpus path
scripts/coccinelle/locks/call_kern.cocci
Extension
.cocci
Size
2200 bytes
Lines
107
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: scripts
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/// Find functions that refer to GFP_KERNEL but are called with locks held.
//# The proposed change of converting the GFP_KERNEL is not necessarily the
//# correct one.  It may be desired to unlock the lock, or to not call the
//# function under the lock in the first place.
///
// Confidence: Moderate
// Copyright: (C) 2012 Nicolas Palix.
// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.
// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.
// URL: https://coccinelle.gitlabpages.inria.fr/website
// Comments:
// Options: --no-includes --include-headers

virtual patch
virtual context
virtual org
virtual report

@gfp exists@
identifier fn;
position p;
@@

fn(...) {
 ... when != read_unlock_irq(...)
     when != write_unlock_irq(...)
     when != read_unlock_irqrestore(...)
     when != write_unlock_irqrestore(...)
     when != spin_unlock(...)
     when != spin_unlock_irq(...)
     when != spin_unlock_irqrestore(...)
     when != local_irq_enable(...)
     when any
 GFP_KERNEL@p
 ... when any
}

@locked exists@
identifier gfp.fn;
position p1,p2;
@@

(
read_lock_irq@p1
|
write_lock_irq@p1
|
read_lock_irqsave@p1
|
write_lock_irqsave@p1
|
spin_lock@p1
|
spin_trylock@p1
|
spin_lock_irq@p1
|
spin_lock_irqsave@p1
|
local_irq_disable@p1
)
 (...)
...  when != read_unlock_irq(...)
     when != write_unlock_irq(...)
     when != read_unlock_irqrestore(...)
     when != write_unlock_irqrestore(...)
     when != spin_unlock(...)
     when != spin_unlock_irq(...)
     when != spin_unlock_irqrestore(...)

Annotation

Implementation Notes