Changes to user-space access APIs in the Linux kernel
Given that Linus Torvalds rarely writes such a large series of code these days, the merging of a 48-part patch series from him is a notable event. These patches mark the end of user-space access functions like `__get_user()` and `__put_user()`.
Summary: Given that Linus Torvalds rarely writes such a large series of code these days, the merging of a 48-part patch series from him is a notable event. These patches mark the end of user-space access functions like
__get_user()and__put_user().
In the Linux kernel, __get_user() and __put_user() functions were fundamental mechanisms enabling kernel code to safely access user-space memory. These functions ensured security and stability by validating user-provided addresses.
This patch series, submitted by Linus Torvalds, introduces newer, likely more secure or efficient mechanisms to replace these older APIs. This change represents a significant architectural evolution in how user-space accesses are managed within the kernel.
For live systems and infrastructure operations, this change will not have a direct immediate impact. However, engineers developing kernel modules or working at the kernel level will need to adapt their code to the new APIs. This could enhance kernel stability and security in the long run.
For kernel developers, this means cleaning up old and potentially error-prone code paths. The new APIs are expected to offer better error handling or more optimized memory access, contributing to overall system performance and reliability.
🔗 Source: LWN.net
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