linux

Huacai Chen c14af233fb MIPS: Hibernate: Flush TLB entries in swsusp_arch_resume() The original MIPS hibernate code flushes cache and TLB entries in swsusp_arch_resume(). But they are removed in Commit `44eeab6741` (MIPS: Hibernation: Remove SMP TLB and cacheflushing code.). A cross- CPU flush is surely unnecessary because all but the local CPU have already been disabled. But a local flush (at least the TLB flush) is needed. When we do hibernation on Loongson-3 with an E1000E NIC, it is very easy to produce a kernel panic (kernel page fault, or unaligned access). The root cause is E1000E driver use vzalloc_node() to allocate pages, the stale TLB entries of the booting kernel will be misused by the resumed target kernel. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/6643/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		History 2014-03-31 10:16:53 +02:00
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cpu.c	MIPS: Whitespace cleanup.	2013-02-01 10:00:22 +01:00
hibernate.S	MIPS: Hibernate: Flush TLB entries in swsusp_arch_resume()	2014-03-31 10:16:53 +02:00
Makefile	MIPS: Add hibernation support	2009-06-17 11:06:31 +01:00