From: Catalin Marinas Date: Tue, 23 Jul 2013 15:15:36 +0000 (+0100) Subject: ARM: 7790/1: Fix deferred mm switch on VIVT processors X-Git-Tag: v3.11-rc4~12^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bdae73cd374e28db544fdd9b77de689a36e3c129;p=pandora-kernel.git ARM: 7790/1: Fix deferred mm switch on VIVT processors As of commit b9d4d42ad9 (ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on pre-ARMv6 CPUs), the mm switching on VIVT processors is done in the finish_arch_post_lock_switch() function to avoid whole cache flushing with interrupts disabled. The need for deferred mm switch is stored as a thread flag (TIF_SWITCH_MM). However, with preemption enabled, we can have another thread switch before finish_arch_post_lock_switch(). If the new thread has the same mm as the previous 'next' thread, the scheduler will not call switch_mm() and the TIF_SWITCH_MM flag won't be set for the new thread. This patch moves the switch pending flag to the mm_context_t structure since this is specific to the mm rather than thread. Signed-off-by: Catalin Marinas Reported-by: Marc Kleine-Budde Tested-by: Marc Kleine-Budde Cc: # 3.5+ Signed-off-by: Russell King --- Reading git-diff-tree failed