xtensa: new fast_alloca handler
authorMax Filippov <jcmvbkbc@gmail.com>
Sun, 14 Jul 2013 22:02:24 +0000 (02:02 +0400)
committerChris Zankel <chris@zankel.net>
Fri, 6 Sep 2013 16:48:12 +0000 (09:48 -0700)
commitfff96d69f2af28f3243d1349341b6305f318f5a4
tree68a2a0bf65ca705cfbcad147520f40cf5aef84f1
parent99d5040ebc3cccc90dfe031f615ac3fbc79905b6
xtensa: new fast_alloca handler

Instead of emulating movsp instruction in the kernel use window
underflow handler to load missing register window and retry failed
movsp.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
arch/xtensa/kernel/entry.S