[PATCH v5 01/30] regset: Add support for dynamically sized regsets

[Catalin Marinas]

On Tue, Oct 31, 2017 at 03:50:53PM +0000, Dave P Martin wrote:
> Currently the regset API doesn't allow for the possibility that
> regsets (or at least, the amount of meaningful data in a regset)
> may change in size.
> 
> In particular, this results in useless padding being added to
> coredumps if a regset's current size is smaller than its
> theoretical maximum size.
> 
> This patch adds a get_size() function to struct user_regset.
> Individual regset implementations can implement this function to
> return the current size of the regset data.  A regset_size()
> function is added to provide callers with an abstract interface for
> determining the size of a regset without needing to know whether
> the regset is dynamically sized or not.
> 
> The only affected user of this interface is the ELF coredump code:
> This patch ports ELF coredump to dump regsets with their actual
> size in the coredump.  This has no effect except for new regsets
> that are dynamically sized and provide a get_size() implementation.
> 
> Signed-off-by: Dave Martin <Dave.Martin at arm.com>
> Reviewed-by: Alex Bennée <alex.bennee at linaro.org>
> Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Oleg Nesterov <oleg at redhat.com>
> Cc: Alexander Viro <viro at zeniv.linux.org.uk>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: Ingo Molnar <mingo at redhat.com>
> Cc: "H. Peter Anvin" <hpa at zytor.com>
> Cc: Dmitry Safonov <dsafonov at virtuozzo.com>
> Cc: H. J. Lu <hjl.tools at gmail.com>
> 
> ---
> 
> **Dropped** Reviewed-by: Alex Bennée <alex.bennee at linaro.org>
> **Dropped** Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>
> (due to bug fix applied against v4 of this patch.)

It seems that the Reviewed-by tags are still there ;). Anyway, on the
new patch:

Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>