https://github.com/torvalds/linux
- v5.9-rc8
- v5.9-rc7
- v5.9-rc6
- v5.9-rc5
- v5.9-rc4
- v5.9-rc3
- v5.9-rc2
- v5.9-rc1
- v5.9
- v5.8-rc7
- v5.8-rc6
- v5.8-rc5
- v5.8-rc4
- v5.8-rc3
- v5.8-rc2
- v5.8-rc1
- v5.8
- v5.7-rc7
- v5.7-rc6
- v5.7-rc5
- v5.7-rc4
- v5.7-rc3
- v5.7-rc2
- v5.7-rc1
- v5.7
- v5.6-rc7
- v5.6-rc6
- v5.6-rc5
- v5.6-rc4
- v5.6-rc3
- v5.6-rc2
- v5.6-rc1
- v5.6
- v5.5-rc7
- v5.5-rc6
- v5.5-rc5
- v5.5-rc4
- v5.5-rc3
- v5.5-rc2
- v5.5-rc1
- v5.5
- v5.4-rc8
- v5.4-rc7
- v5.4-rc6
- v5.4-rc5
- v5.4-rc4
- v5.4-rc3
- v5.4-rc2
- v5.4-rc1
- v5.4
- v5.3-rc8
- v5.3-rc7
- v5.3-rc6
- v5.3-rc5
- v5.3-rc4
- v5.3-rc3
- v5.3-rc2
- v5.3-rc1
- v5.3
- v5.2-rc7
- v5.2-rc6
- v5.2-rc5
- v5.2-rc4
- v5.2-rc3
- v5.2-rc2
- v5.2-rc1
- v5.2
- v5.15-rc6
- v5.15-rc5
- v5.15-rc4
- v5.15-rc3
- v5.15-rc2
- v5.15-rc1
- v5.14-rc7
- v5.14-rc6
- v5.14-rc5
- v5.14-rc4
- v5.14-rc3
- v5.14-rc2
- v5.14-rc1
- v5.14
- v5.13-rc7
- v5.13-rc6
- v5.13-rc5
- v5.13-rc4
- v5.13-rc3
- v5.13-rc2
- v5.13-rc1
- v5.13
- v5.12-rc8
- v5.12-rc7
- v5.12-rc6
- v5.12-rc5
- v5.12-rc4
- v5.12-rc3
- v5.12-rc2
- v5.12-rc1
- v5.12
- v5.11-rc7
- v5.11-rc6
- v5.11-rc5
- v5.11-rc4
- v5.11-rc3
- v5.11-rc2
- v5.11-rc1
- v5.11
- v5.10-rc7
- v5.10-rc6
- v5.10-rc5
- v5.10-rc4
- v5.10-rc3
- v5.10-rc2
- v5.10-rc1
- v5.10
- v5.1-rc7
- v5.1-rc6
- v5.1-rc5
- v5.1-rc4
- v5.1-rc3
- v5.1-rc2
- v5.1-rc1
- v5.1
- v5.0-rc8
- v5.0-rc7
- v5.0-rc6
- v5.0-rc5
- v5.0-rc4
- v5.0-rc3
- v5.0-rc2
- v5.0-rc1
- v5.0
- v4.9-rc8
- v4.9-rc7
- v4.9-rc6
- v4.9-rc5
- v4.9-rc4
- v4.9-rc3
- v4.9-rc2
- v4.9-rc1
- v4.9
- v4.8-rc8
- v4.8-rc7
- v4.8-rc6
- v4.8-rc5
- v4.8-rc4
- v4.8-rc3
- v4.8-rc2
- v4.8-rc1
- v4.8
- v4.7-rc7
- v4.7-rc6
- v4.7-rc5
- v4.7-rc4
- v4.7-rc3
- v4.7-rc2
- v4.7-rc1
- v4.7
- v4.6-rc7
- v4.6-rc6
- v4.6-rc5
- v4.6-rc4
- v4.6-rc3
- v4.6-rc2
- v4.6-rc1
- v4.6
- v4.5-rc7
- v4.5-rc6
- v4.5-rc5
- v4.5-rc4
- v4.5-rc3
- v4.5-rc2
- v4.5-rc1
- v4.5
- v4.4-rc8
- v4.4-rc7
- v4.4-rc6
- v4.4-rc5
- v4.4-rc4
- v4.4-rc3
- v4.4-rc2
- v4.4-rc1
- v4.4
- v4.3-rc7
- v4.3-rc6
- v4.3-rc5
- v4.3-rc4
- v4.3-rc3
- v4.3-rc2
- v4.3-rc1
- v4.3
- v4.20-rc7
- v4.20-rc6
- v4.20-rc5
- v4.20-rc4
- v4.20-rc3
- v4.20-rc2
- v4.20-rc1
- v4.20
- v4.2-rc8
- v4.2-rc7
- v4.2-rc6
- v4.2-rc5
- v4.2-rc4
- v4.2-rc3
- v4.2-rc2
- v4.2-rc1
- v4.2
- v4.19-rc8
- v4.19-rc7
- v4.19-rc6
- v4.19-rc5
- v4.19-rc4
- v4.19-rc3
- v4.19-rc2
- v4.19-rc1
- v4.19
- v4.18-rc8
- v4.18-rc7
- v4.18-rc6
- v4.18-rc5
- v4.18-rc4
- v4.18-rc3
- v4.18-rc2
- v4.18-rc1
- v4.18
- v4.17-rc7
- v4.17-rc6
- v4.17-rc5
- v4.17-rc4
- v4.17-rc3
- v4.17-rc2
- v4.17-rc1
- v4.17
- v4.16-rc7
- v4.16-rc6
- v4.16-rc5
- v4.16-rc4
- v4.16-rc3
- v4.16-rc2
- v4.16-rc1
- v4.16
- v4.15-rc9
- v4.15-rc8
- v4.15-rc7
- v4.15-rc6
- v4.15-rc5
- v4.15-rc4
- v4.15-rc3
- v4.15-rc2
- v4.15-rc1
- v4.15
- v4.14-rc8
- v4.14-rc7
- v4.14-rc6
- v4.14-rc5
- v4.14-rc4
- v4.14-rc3
- v4.14-rc2
- v4.14-rc1
- v4.14
- v4.13-rc7
- v4.13-rc6
- v4.13-rc5
- v4.13-rc4
- v4.13-rc3
- v4.13-rc2
- v4.13-rc1
- v4.13
- v4.12-rc7
- v4.12-rc6
- v4.12-rc5
- v4.12-rc4
- v4.12-rc3
- v4.12-rc2
- v4.12-rc1
- v4.12
- v4.11-rc8
- v4.11-rc7
- v4.11-rc6
- v4.11-rc5
- v4.11-rc4
- v4.11-rc3
- v4.11-rc2
- v4.11-rc1
- v4.11
- v4.10-rc8
- v4.10-rc7
- v4.10-rc6
- v4.10-rc5
- v4.10-rc4
- v4.10-rc3
- v4.10-rc2
- v4.10-rc1
- v4.10
- v4.1-rc8
- v4.1-rc7
- v4.1-rc6
- v4.1-rc5
- v4.1-rc4
- v4.1-rc3
- v4.1-rc2
- v4.1-rc1
- v4.1
- v4.0-rc7
- v4.0-rc6
- v4.0-rc5
- v4.0-rc4
- v4.0-rc3
- v4.0-rc2
- v4.0-rc1
- v4.0
- v3.9-rc8
- v3.9-rc7
- v3.9-rc6
- v3.9-rc5
- v3.9-rc4
- v3.9-rc3
- v3.9-rc2
- v3.9-rc1
- v3.9
- v3.8-rc7
- v3.8-rc6
- v3.8-rc5
- v3.8-rc4
- v3.8-rc3
- v3.8-rc2
- v3.8-rc1
- v3.8
- v3.7-rc8
- v3.7-rc7
- v3.7-rc6
- v3.7-rc5
- v3.7-rc4
- v3.7-rc3
- v3.7-rc2
- v3.7-rc1
- v3.7
- v3.6-rc7
- v3.6-rc6
- v3.6-rc5
- v3.6-rc4
- v3.6-rc3
- v3.6-rc2
- v3.6-rc1
- v3.6
- v3.5-rc7
- v3.5-rc6
- v3.5-rc5
- v3.5-rc4
- v3.5-rc3
- v3.5-rc2
- v3.5-rc1
- v3.5
- v3.4-rc7
- v3.4-rc6
- v3.4-rc5
- v3.4-rc4
- v3.4-rc3
- v3.4-rc2
- v3.4-rc1
- v3.4
- v3.3-rc7
- v3.3-rc6
- v3.3-rc5
- v3.3-rc4
- v3.3-rc3
- v3.3-rc2
- v3.3-rc1
- v3.3
- v3.2-rc7
- v3.2-rc6
- v3.2-rc5
- v3.2-rc4
- v3.2-rc3
- v3.2-rc2
- v3.2-rc1
- v3.2
- v3.19-rc7
- v3.19-rc6
- v3.19-rc5
- v3.19-rc4
- v3.19-rc3
- v3.19-rc2
- v3.19-rc1
- v3.19
- v3.18-rc7
- v3.18-rc6
- v3.18-rc5
- v3.18-rc4
- v3.18-rc3
- v3.18-rc2
- v3.18-rc1
- v3.18
- v3.17-rc7
- v3.17-rc6
- v3.17-rc5
- v3.17-rc4
- v3.17-rc3
- v3.17-rc2
- v3.17-rc1
- v3.17
- v3.16-rc7
- v3.16-rc6
- v3.16-rc5
- v3.16-rc4
- v3.16-rc3
- v3.16-rc2
- v3.16-rc1
- v3.16
- v3.15-rc8
- v3.15-rc7
- v3.15-rc6
- v3.15-rc5
- v3.15-rc4
- v3.15-rc3
- v3.15-rc2
- v3.15-rc1
- v3.15
- v3.14-rc8
- v3.14-rc7
- v3.14-rc6
- v3.14-rc5
- v3.14-rc4
- v3.14-rc3
- v3.14-rc2
- v3.14-rc1
- v3.14
- v3.13-rc8
- v3.13-rc7
- v3.13-rc6
- v3.13-rc5
- v3.13-rc4
- v3.13-rc3
- v3.13-rc2
- v3.13-rc1
- v3.13
- v3.12-rc7
- v3.12-rc6
- v3.12-rc5
- v3.12-rc4
- v3.12-rc3
- v3.12-rc2
- v3.12-rc1
- v3.12
- v3.11-rc7
- v3.11-rc6
- v3.11-rc5
- v3.11-rc4
- v3.11-rc3
- v3.11-rc2
- v3.11-rc1
- v3.11
- v3.10-rc7
- v3.10-rc6
- v3.10-rc5
- v3.10-rc4
- v3.10-rc3
- v3.10-rc2
- v3.10-rc1
- v3.10
- v3.1-rc9
- v3.1-rc8
- v3.1-rc7
- v3.1-rc6
- v3.1-rc5
- v3.1-rc4
- v3.1-rc3
- v3.1-rc2
- v3.1-rc10
- v3.1-rc1
- v3.1
- v3.0-rc7
- v3.0-rc6
- v3.0-rc5
- v3.0-rc4
- v3.0-rc3
- v3.0-rc2
- v3.0-rc1
- v3.0
- v2.6.39-rc7
- v2.6.39-rc6
- v2.6.39-rc5
- v2.6.39-rc4
- v2.6.39-rc3
- v2.6.39-rc2
- v2.6.39-rc1
- v2.6.39
- v2.6.38-rc8
- v2.6.38-rc7
- v2.6.38-rc6
- v2.6.38-rc5
- v2.6.38-rc4
- v2.6.38-rc3
- v2.6.38-rc2
- v2.6.38-rc1
- v2.6.38
- v2.6.37-rc8
- v2.6.37-rc7
- v2.6.37-rc6
- v2.6.37-rc5
- v2.6.37-rc4
- v2.6.37-rc3
- v2.6.37-rc2
- v2.6.37-rc1
- v2.6.37
- v2.6.36-rc8
- v2.6.36-rc7
- v2.6.36-rc6
- v2.6.36-rc5
- v2.6.36-rc4
- v2.6.36-rc3
- v2.6.36-rc2
- v2.6.36-rc1
- v2.6.36
- v2.6.35-rc6
- v2.6.35-rc5
- v2.6.35-rc4
- v2.6.35-rc3
- v2.6.35-rc2
- v2.6.35-rc1
- v2.6.35
- v2.6.34-rc7
- v2.6.34-rc6
- v2.6.34-rc5
- v2.6.34-rc4
- v2.6.34-rc3
- v2.6.34-rc2
- v2.6.34-rc1
- v2.6.34
- v2.6.33-rc8
- v2.6.33-rc7
- v2.6.33-rc6
- v2.6.33-rc5
- v2.6.33-rc4
- v2.6.33-rc3
- v2.6.33-rc2
- v2.6.33-rc1
- v2.6.33
- v2.6.32-rc8
- v2.6.32-rc7
- v2.6.32-rc6
- v2.6.32-rc5
- v2.6.32-rc4
- v2.6.32-rc3
- v2.6.32-rc1
- v2.6.32
- v2.6.31-rc9
- v2.6.31-rc8
- v2.6.31-rc7
- v2.6.31-rc6
- v2.6.31-rc5
- v2.6.31-rc4
- v2.6.31-rc3
- v2.6.31-rc2
- v2.6.31-rc1
- v2.6.31
- v2.6.30-rc8
- v2.6.30-rc7
- v2.6.30-rc6
- v2.6.30-rc5
- v2.6.30-rc4
- v2.6.30-rc3
- v2.6.30-rc2
- v2.6.30-rc1
- v2.6.30
- v2.6.29-rc8
- v2.6.29-rc7
- v2.6.29-rc6
- v2.6.29-rc5
- v2.6.29-rc4
- v2.6.29-rc3
- v2.6.29-rc2
- v2.6.29-rc1
- v2.6.29
- v2.6.28-rc9
- v2.6.28-rc8
- v2.6.28-rc7
- v2.6.28-rc6
- v2.6.28-rc5
- v2.6.28-rc4
- v2.6.28-rc3
- v2.6.28-rc2
- v2.6.28-rc1
- v2.6.28
- v2.6.27-rc9
- v2.6.27-rc8
- v2.6.27-rc7
- v2.6.27-rc6
- v2.6.27-rc5
- v2.6.27-rc4
- v2.6.27-rc3
- v2.6.27-rc2
- v2.6.27-rc1
- v2.6.27
- v2.6.26-rc9
- v2.6.26-rc8
- v2.6.26-rc7
- v2.6.26-rc6
- v2.6.26-rc5
- v2.6.26-rc4
- v2.6.26-rc3
- v2.6.26-rc2
- v2.6.26-rc1
- v2.6.26
- v2.6.25-rc9
- v2.6.25-rc8
- v2.6.25-rc7
- v2.6.25-rc6
- v2.6.25-rc5
- v2.6.25-rc4
- v2.6.25-rc3
- v2.6.25-rc2
- v2.6.25-rc1
- v2.6.25
- v2.6.24-rc8
- v2.6.24-rc7
- v2.6.24-rc6
- v2.6.24-rc5
- v2.6.24-rc4
- v2.6.24-rc3
- v2.6.24-rc2
- v2.6.24-rc1
- v2.6.24
- v2.6.23-rc9
- v2.6.23-rc8
- v2.6.23-rc7
- v2.6.23-rc6
- v2.6.23-rc5
- v2.6.23-rc4
- v2.6.23-rc3
- v2.6.23-rc2
- v2.6.23-rc1
- v2.6.23
- v2.6.22-rc7
- v2.6.22-rc6
- v2.6.22-rc5
- v2.6.22-rc4
- v2.6.22-rc3
- v2.6.22-rc2
- v2.6.22-rc1
- v2.6.22
- v2.6.21-rc7
- v2.6.21-rc6
- v2.6.21-rc5
- v2.6.21-rc4
- v2.6.21-rc3
- v2.6.21-rc2
- v2.6.21-rc1
- v2.6.21
- v2.6.20-rc7
- v2.6.20-rc6
- v2.6.20-rc5
- v2.6.20-rc4
- v2.6.20-rc3
- v2.6.20-rc2
- v2.6.20-rc1
- v2.6.20
- v2.6.19-rc6
- v2.6.19-rc5
- v2.6.19-rc4
- v2.6.19-rc3
- v2.6.19-rc2
- v2.6.19-rc1
- v2.6.19
- v2.6.18-rc7
- v2.6.18-rc6
- v2.6.18-rc5
- v2.6.18-rc4
- v2.6.18-rc3
- v2.6.18-rc2
- v2.6.18-rc1
- v2.6.18
- v2.6.17-rc6
- v2.6.17-rc5
- v2.6.17-rc4
- v2.6.17-rc3
- v2.6.17-rc2
- v2.6.17-rc1
- v2.6.17
- v2.6.16-rc6
- v2.6.16-rc5
- v2.6.16-rc4
- v2.6.16-rc3
- v2.6.16-rc2
- v2.6.16-rc1
- v2.6.16
- v2.6.15-rc7
- v2.6.15-rc6
- v2.6.15-rc5
- v2.6.15-rc4
- v2.6.15-rc3
- v2.6.15-rc2
- v2.6.15-rc1
- v2.6.15
- v2.6.14-rc5
- v2.6.14-rc4
- v2.6.14-rc3
- v2.6.14-rc2
- v2.6.14-rc1
- v2.6.14
- v2.6.13-rc7
- v2.6.13-rc6
- v2.6.13-rc5
- v2.6.13-rc4
- v2.6.13-rc3
- v2.6.13-rc2
- v2.6.13-rc1
- v2.6.13
- v2.6.12-rc6
- v2.6.12-rc5
- v2.6.12-rc4
- v2.6.12-rc3
- v2.6.12-rc2
- v2.6.12
- v2.6.11-tree
Raw File
Take a new snapshot of a software origin
If the archived software origin currently browsed is not synchronized with its upstream version (for instance when new commits have been issued), you can explicitly request Software Heritage to take a new snapshot of it.
Use the form below to proceed. Once a request has been submitted and accepted, it will be processed as soon as possible. You can then check its processing state by visiting this dedicated page.Processing "take a new snapshot" request ...
Permalinks
To reference or cite the objects present in the Software Heritage archive, permalinks based on SoftWare Hash IDentifiers (SWHIDs) must be used.
Select below a type of object currently browsed in order to display its associated SWHID and permalink.
Tip revision: 17b57b1883c1285f3d0dc2266e8f79286a7bef38 authored by Greg Kroah-Hartman on 30 September 2018, 14:15:35 UTC
Linux 4.19-rc6
Linux 4.19-rc6
Tip revision: 17b57b1
atomic_bitops.txt
On atomic bitops.
While our bitmap_{}() functions are non-atomic, we have a number of operations
operating on single bits in a bitmap that are atomic.
API
---
The single bit operations are:
Non-RMW ops:
test_bit()
RMW atomic operations without return value:
{set,clear,change}_bit()
clear_bit_unlock()
RMW atomic operations with return value:
test_and_{set,clear,change}_bit()
test_and_set_bit_lock()
Barriers:
smp_mb__{before,after}_atomic()
All RMW atomic operations have a '__' prefixed variant which is non-atomic.
SEMANTICS
---------
Non-atomic ops:
In particular __clear_bit_unlock() suffers the same issue as atomic_set(),
which is why the generic version maps to clear_bit_unlock(), see atomic_t.txt.
RMW ops:
The test_and_{}_bit() operations return the original value of the bit.
ORDERING
--------
Like with atomic_t, the rule of thumb is:
- non-RMW operations are unordered;
- RMW operations that have no return value are unordered;
- RMW operations that have a return value are fully ordered.
- RMW operations that are conditional are unordered on FAILURE,
otherwise the above rules apply. In the case of test_and_{}_bit() operations,
if the bit in memory is unchanged by the operation then it is deemed to have
failed.
Except for a successful test_and_set_bit_lock() which has ACQUIRE semantics and
clear_bit_unlock() which has RELEASE semantics.
Since a platform only has a single means of achieving atomic operations
the same barriers as for atomic_t are used, see atomic_t.txt.