linux-kernel - [PATCH] powerpc: remove check for CONFIG_SERIAL_TEXT

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Message-ID: <1400619776.4912.71.camel@x220>
Date:	Tue, 20 May 2014 23:02:56 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: remove check for CONFIG_SERIAL_TEXT_DEBUG

The Kconfig symbol SERIAL_TEXT_DEBUG was removed from
arch/powerpc/Kconfig.debug in v2.6.22. (In v2.6.27 it was also removed
from arch/ppc/Kconfig.debug.) So the check for its macro has evaluated
to false for over five years now. Remove that check and the few lines
of code hidden behind it.

Signed-off-by: Paul Bolle <pebolle@...cali.nl>
---
Untested.

 arch/powerpc/kernel/head_40x.S | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 67ee0d6c1070..7d7d8635227a 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -930,25 +930,6 @@ initial_mmu:
 	tlbwe	r4,r0,TLB_DATA		/* Load the data portion of the entry */
 	tlbwe	r3,r0,TLB_TAG		/* Load the tag portion of the entry */
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) && defined(SERIAL_DEBUG_IO_BASE)
-
-	/* Load a TLB entry for the UART, so that ppc4xx_progress() can use
-	 * the UARTs nice and early.  We use a 4k real==virtual mapping. */
-
-	lis	r3,SERIAL_DEBUG_IO_BASE@h
-	ori	r3,r3,SERIAL_DEBUG_IO_BASE@l
-	mr	r4,r3
-	clrrwi	r4,r4,12
-	ori	r4,r4,(TLB_WR|TLB_I|TLB_M|TLB_G)
-
-	clrrwi	r3,r3,12
-	ori	r3,r3,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K))
-
-	li	r0,0			/* TLB slot 0 */
-	tlbwe	r4,r0,TLB_DATA
-	tlbwe	r3,r0,TLB_TAG
-#endif /* CONFIG_SERIAL_DEBUG_TEXT && SERIAL_DEBUG_IO_BASE */
-
 	isync
 
 	/* Establish the exception vector base
-- 
1.9.0

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