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authorAnup Patel <Anup.Patel@wdc.com>2019-03-22 10:04:44 +0000
committerPalmer Dabbelt <palmer@sifive.com>2019-03-28 23:16:04 -0700
commitff0e2a7bd13f7c332d7f09ff45d08df4bf512ce0 (patch)
treeece8d34390ec30a1c5a35966c34d0a11bdefa897 /arch
parent387181dcdb6c1ee254efab4744846a7a53d4c4cb (diff)
downloadlinux-stericsson-ff0e2a7bd13f7c332d7f09ff45d08df4bf512ce0.tar.gz
RISC-V: Fix FIXMAP_TOP to avoid overlap with VMALLOC area
The FIXMAP area overlaps with VMALLOC area in Linux-5.1-rc1 hence we get below warning in Linux RISC-V 32bit kernel. This warning does not show-up in Linux RISC-V 64bit kernel due to large VMALLOC area. WARNING: CPU: 0 PID: 22 at mm/vmalloc.c:150 vmap_page_range_noflush+0x134/0x15c Modules linked in: CPU: 0 PID: 22 Comm: kworker/0:1 Not tainted 5.1.0-rc1-00005-gebc2f658040e #1 Workqueue: events pcpu_balance_workfn Call Trace: [<c002b950>] walk_stackframe+0x0/0xa0 [<c002baac>] show_stack+0x28/0x32 [<c0587354>] dump_stack+0x62/0x7e [<c002fdee>] __warn+0x98/0xce [<c002fe52>] warn_slowpath_null+0x2e/0x3c [<c00e71ce>] vmap_page_range_noflush+0x134/0x15c [<c00e7886>] map_kernel_range_noflush+0xc/0x14 [<c00d54b8>] pcpu_populate_chunk+0x19e/0x236 [<c00d610e>] pcpu_balance_workfn+0x448/0x464 [<c00408d6>] process_one_work+0x16c/0x2ea [<c0040b46>] worker_thread+0xf2/0x3b2 [<c004519a>] kthread+0xce/0xdc [<c002a974>] ret_from_exception+0x0/0xc This patch fixes above warning by placing FIXMAP area below VMALLOC area. Fixes: f2c17aabc917 ("RISC-V: Implement compile-time fixed mappings") Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/riscv/include/asm/fixmap.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/fixmap.h b/arch/riscv/include/asm/fixmap.h
index 57afe604b495..c207f6634b91 100644
--- a/arch/riscv/include/asm/fixmap.h
+++ b/arch/riscv/include/asm/fixmap.h
@@ -26,7 +26,7 @@ enum fixed_addresses {
};
#define FIXADDR_SIZE (__end_of_fixed_addresses * PAGE_SIZE)
-#define FIXADDR_TOP (PAGE_OFFSET)
+#define FIXADDR_TOP (VMALLOC_START)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
#define FIXMAP_PAGE_IO PAGE_KERNEL