Opened 15 years ago
Closed 15 years ago
#153 closed defect (fixed)
atomic operations are broken on arm32
Reported by: | Jakub Jermář | Owned by: | |
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Priority: | critical | Milestone: | 0.4.2 |
Component: | helenos/kernel/arm32 | Version: | mainline |
Keywords: | Cc: | jakub@… | |
Blocker for: | Depends on: | ||
See also: |
Description
There are two points:
- the inline asm code just looks hopelessly wrong
- on pre-ARMv6, there is only the swp[b] instruction, which is not enough to implement atomic addition and/or compare and swap
Change History (4)
comment:1 by , 15 years ago
Priority: | major → critical |
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comment:2 by , 15 years ago
Cc: | added |
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comment:3 by , 15 years ago
comment:4 by , 15 years ago
Resolution: | → fixed |
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Status: | new → closed |
changeset:head,166 fixed the remaining part of the problem in userspace.
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Changeset:head,160 fixed this ticket in the kernel. The arm32 uspace remains broken.