tree f6d3d835f5fca88fd4de01f166d782f16c2fe3c9
parent 862c588f062fe9339a180cf6429e4df1855c376a
author Will Deacon <will.deacon@arm.com> 1362070120 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1362351256 +0000

ARM: 7661/1: mm: perform explicit branch predictor maintenance when required

The ARM ARM requires branch predictor maintenance if, for a given ASID,
the instructions at a specific virtual address appear to change.

From the kernel's point of view, that means:

	- Changing the kernel's view of memory (e.g. switching to the
	  identity map)
	- ASID rollover (since ASIDs will be re-allocated to new tasks)

This patch adds explicit branch predictor maintenance when either of the
two conditions above are met.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>