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56 lines
1.7 KiB
Diff
56 lines
1.7 KiB
Diff
From 679a5be6f06b909adccc9c588feb26bf6d6df402 Mon Sep 17 00:00:00 2001
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From: Kurt Mahan <kmahan@freescale.com>
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Date: Thu, 6 Dec 2007 16:40:39 -0700
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Subject: [PATCH] Add zero length checking to cache routines.
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LTIBName: mcfv4e-cache-ck-0-len
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Signed-off-by: Kurt Mahan <kmahan@freescale.com>
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---
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include/asm-m68k/cf_cacheflush.h | 14 +++++++++++---
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1 files changed, 11 insertions(+), 3 deletions(-)
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--- a/include/asm-m68k/cf_cacheflush.h
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+++ b/include/asm-m68k/cf_cacheflush.h
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@@ -127,7 +127,9 @@ static inline void flush_bcache(void)
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static inline void cf_cache_clear(unsigned long paddr, int len)
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{
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/* number of lines */
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- len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ if (len == 0)
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+ return;
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/* align on set boundary */
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paddr &= 0xfffffff0;
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@@ -161,7 +163,9 @@ static inline void cf_cache_clear(unsign
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static inline void cf_cache_push(unsigned long paddr, int len)
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{
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/* number of lines */
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- len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ if (len == 0)
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+ return;
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/* align on set boundary */
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paddr &= 0xfffffff0;
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@@ -195,7 +199,9 @@ static inline void cf_cache_push(unsigne
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static inline void cf_cache_flush(unsigned long paddr, int len)
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{
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/* number of lines */
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- len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
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+ if (len == 0)
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+ return;
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/* align on set boundary */
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paddr &= 0xfffffff0;
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@@ -234,6 +240,8 @@ static inline void cf_cache_flush_range(
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vstart &= 0xfffffff0;
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vend = PAGE_ALIGN((vend + (CACHE_LINE_SIZE-1))) & 0xfffffff0;
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len = vend - vstart;
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+ if (len == 0)
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+ return;
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vstart = __pa(vstart);
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vend = vstart + len;
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