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eda32f4f93
xfeatures_mask_fpstate() is no longer valid when dynamically enabled features come into play. Rework restore_regs_from_fpstate() so it takes a constant mask which will then be applied against the maximum feature set so that the restore operation brings all features which are not in the xsave buffer xfeature bitmap into init state. This ensures that if the previous task used a dynamically enabled feature that the task which restores has all unused components properly initialized. Cleanup the last user of xfeatures_mask_fpstate() as well and remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20211014230739.461348278@linutronix.de
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.