[PATCH -next v17 12/20] riscv: signal: check fp-reserved words unconditionally

[Heiko Stübner]

Am Montag, 27. März 2023, 18:49:32 CEST schrieb Andy Chiu:
> In order to let kernel/user locate and identify an extension context on
> the existing sigframe, we are going to utilize reserved space of fp and
> encode the information there. And since the sigcontext has already
> preserved a space for fp context w or w/o CONFIG_FPU, we move those
> reserved words checking/setting routine back into generic code.
> 
> This commit also undone an additional logical change carried by the
> refactor commit 007f5c3589578
> ("Refactor FPU code in signal setup/return procedures"). Originally we
> did not restore fp context if restoring of gpr have failed. And it was
> fine on the other side. In such way the kernel could keep the regfiles
> intact, and potentially react at the failing point of restore.
> 
> Signed-off-by: Andy Chiu <andy.chiu at sifive.com>
> Acked-by: Conor Dooley <conor.dooley at microchip.com>

Acked-by: Heiko Stuebner <heiko.stuebner at vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner at vrull.eu>