The choose_32_64() macros were added to deal with an odd inconsistency between the 32-bit and 64-bit layout of 'struct stat' way back when in commit a52dd971f947 ("vfs: de-crapify "cp_new_stat()" function"). Then a decade later Mikulas noticed that said inconsistency had been a mistake in the early x86-64 port, and shouldn't have existed in the first place. So commit 932aba1e1690 ("stat: fix inconsistency between struct stat and struct compat_stat") removed the uses of the helpers. But the helpers remained around, unused. Get rid of them. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.
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