diff options
Diffstat (limited to 'target/linux/ramips/patches-3.10/0203-MIPS-Fix-accessing-to-per-cpu-data-when-flushing-the.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.10/0203-MIPS-Fix-accessing-to-per-cpu-data-when-flushing-the.patch | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/target/linux/ramips/patches-3.10/0203-MIPS-Fix-accessing-to-per-cpu-data-when-flushing-the.patch b/target/linux/ramips/patches-3.10/0203-MIPS-Fix-accessing-to-per-cpu-data-when-flushing-the.patch deleted file mode 100644 index fc853fa..0000000 --- a/target/linux/ramips/patches-3.10/0203-MIPS-Fix-accessing-to-per-cpu-data-when-flushing-the.patch +++ /dev/null @@ -1,84 +0,0 @@ -From 871d1be8c3ce46b8ef395b56cd0e37cede10e76a Mon Sep 17 00:00:00 2001 -From: Ralf Baechle <ralf@linux-mips.org> -Date: Tue, 17 Sep 2013 12:44:31 +0200 -Subject: [PATCH 203/215] MIPS: Fix accessing to per-cpu data when flushing - the cache - -This fixes the following issue - -BUG: using smp_processor_id() in preemptible [00000000] code: kjournald/1761 -caller is blast_dcache32+0x30/0x254 -Call Trace: -[<8047f02c>] dump_stack+0x8/0x34 -[<802e7e40>] debug_smp_processor_id+0xe0/0xf0 -[<80114d94>] blast_dcache32+0x30/0x254 -[<80118484>] r4k_dma_cache_wback_inv+0x200/0x288 -[<80110ff0>] mips_dma_map_sg+0x108/0x180 -[<80355098>] ide_dma_prepare+0xf0/0x1b8 -[<8034eaa4>] do_rw_taskfile+0x1e8/0x33c -[<8035951c>] ide_do_rw_disk+0x298/0x3e4 -[<8034a3c4>] do_ide_request+0x2e0/0x704 -[<802bb0dc>] __blk_run_queue+0x44/0x64 -[<802be000>] queue_unplugged.isra.36+0x1c/0x54 -[<802beb94>] blk_flush_plug_list+0x18c/0x24c -[<802bec6c>] blk_finish_plug+0x18/0x48 -[<8026554c>] journal_commit_transaction+0x3b8/0x151c -[<80269648>] kjournald+0xec/0x238 -[<8014ac00>] kthread+0xb8/0xc0 -[<8010268c>] ret_from_kernel_thread+0x14/0x1c - -Caches in most systems are identical - but not always, so we can't avoid -the use of smp_call_function() by just looking at the boot CPU's data, -have to fiddle with preemption instead. - -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> -Cc: Markos Chandras <markos.chandras@imgtec.com> -Cc: linux-mips@linux-mips.org -Patchwork: https://patchwork.linux-mips.org/patch/5835 -(cherry picked from commit ff522058bd717506b2fa066fa564657f2b86477e) ---- - arch/mips/mm/c-r4k.c | 5 +++++ - 1 file changed, 5 insertions(+) - ---- a/arch/mips/mm/c-r4k.c -+++ b/arch/mips/mm/c-r4k.c -@@ -12,6 +12,7 @@ - #include <linux/highmem.h> - #include <linux/kernel.h> - #include <linux/linkage.h> -+#include <linux/preempt.h> - #include <linux/sched.h> - #include <linux/smp.h> - #include <linux/mm.h> -@@ -601,6 +602,7 @@ static void r4k_dma_cache_wback_inv(unsi - /* Catch bad driver code */ - BUG_ON(size == 0); - -+ preempt_disable(); - if (cpu_has_inclusive_pcaches) { - if (size >= scache_size) - r4k_blast_scache(); -@@ -621,6 +623,7 @@ static void r4k_dma_cache_wback_inv(unsi - R4600_HIT_CACHEOP_WAR_IMPL; - blast_dcache_range(addr, addr + size); - } -+ preempt_enable(); - - bc_wback_inv(addr, size); - __sync(); -@@ -631,6 +634,7 @@ static void r4k_dma_cache_inv(unsigned l - /* Catch bad driver code */ - BUG_ON(size == 0); - -+ preempt_disable(); - if (cpu_has_inclusive_pcaches) { - if (size >= scache_size) - r4k_blast_scache(); -@@ -655,6 +659,7 @@ static void r4k_dma_cache_inv(unsigned l - R4600_HIT_CACHEOP_WAR_IMPL; - blast_inv_dcache_range(addr, addr + size); - } -+ preempt_enable(); - - bc_inv(addr, size); - __sync(); |