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Peter Zijlstra
9e3d6223d2
It turns out that while GCC-4.4 manages to generate 32x32->64 mult instructions for the 32bit mul_u64_u32_shr() code, any GCC after that fails horribly. Fix this by providing an explicit mul_u32_u32() function which can be architcture provided. Reported-by: Chris Metcalf <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Chris Metcalf <[email protected]> [for tile] Cc: Christopher S. Hall <[email protected]> Cc: David Gibson <[email protected]> Cc: John Stultz <[email protected]> Cc: Laurent Vivier <[email protected]> Cc: Liav Rehana <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Parit Bhargava <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Richard Cochran <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.