From: Stefan Agner <stefan@agner.ch>
Date: Tue, 2 Jun 2015 19:43:24 +0000 (+0100)
Subject: ARM: 8383/1: nommu: avoid deprecated source register on mov
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~100^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=970d96f9a81b0dd83ddd8bce0e5e1ba31881c5f5;p=pandora-kernel.git

ARM: 8383/1: nommu: avoid deprecated source register on mov

In Thumb2 mode, the stack register r13 is deprecated if the
destination register is the program counter (r15). Similar to
head.S, head-nommu.S uses r13 to store the return address used
after configuring the CPU's CP15 register. However, since we do
not enable a MMU, there will be no address switch and it is
possible to use branch with link instruction to call
__after_proc_init.

Avoid using r13 completely by using bl to call __after_proc_init
and get rid of __secondary_switched.

Beside removing unnecessary complexity, this also fixes a
compiler warning when compiling a !MMU kernel:
Warning: Use of r13 as a source register is deprecated when r15
is the destination register.

Tested-?by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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