diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2009-06-12 11:36:52 +0300 |
|---|---|---|
| committer | Pekka Enberg <penberg@cs.helsinki.fi> | 2009-06-12 13:50:24 +0300 |
| commit | 55cd63676e0c5710fbe1ea86dfd9f8ea9aaa90f2 (patch) | |
| tree | 1154bbd5e720ce4300c0cf11dd168b665b802878 | |
| parent | 28be225b23b115573e0ecc8ef9996f42a1652f74 (diff) | |
x86: make zap_low_mapping could be used early
Only one cpu is there, just call __flush_tlb for it. Fixes the following boot
warning on x86:
[ 0.000000] Memory: 885032k/915540k available (5993k kernel code, 29844k reserved, 3842k data, 428k init, 0k highmem)
[ 0.000000] virtual kernel memory layout:
[ 0.000000] fixmap : 0xffe17000 - 0xfffff000 (1952 kB)
[ 0.000000] vmalloc : 0xf8615000 - 0xffe15000 ( 120 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xf7e15000 ( 894 MB)
[ 0.000000] .init : 0xc19a5000 - 0xc1a10000 ( 428 kB)
[ 0.000000] .data : 0xc15da4bb - 0xc199af6c (3842 kB)
[ 0.000000] .text : 0xc1000000 - 0xc15da4bb (5993 kB)
[ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok.
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at kernel/smp.c:369 smp_call_function_many+0x50/0x1b0()
[ 0.000000] Hardware name: System Product Name
[ 0.000000] Modules linked in:
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip #52504
[ 0.000000] Call Trace:
[ 0.000000] [<c104aa16>] warn_slowpath_common+0x65/0x95
[ 0.000000] [<c104aa58>] warn_slowpath_null+0x12/0x15
[ 0.000000] [<c1073bbe>] smp_call_function_many+0x50/0x1b0
[ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[ 0.000000] [<c1073d4f>] smp_call_function+0x31/0x58
[ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[ 0.000000] [<c104f635>] on_each_cpu+0x26/0x65
[ 0.000000] [<c10374b5>] flush_tlb_all+0x19/0x1b
[ 0.000000] [<c1032ab3>] zap_low_mappings+0x4d/0x56
[ 0.000000] [<c15d64b5>] ? printk+0x14/0x17
[ 0.000000] [<c19b42a8>] mem_init+0x23d/0x245
[ 0.000000] [<c19a56a1>] start_kernel+0x17a/0x2d5
[ 0.000000] [<c19a5347>] ? unknown_bootoption+0x0/0x19a
[ 0.000000] [<c19a5039>] __init_begin+0x39/0x41
[ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]---
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| -rw-r--r-- | arch/x86/include/asm/tlbflush.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/init_32.c | 10 |
3 files changed, 9 insertions, 5 deletions
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index a5ecc9c33e9..7f3eba08e7d 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -172,6 +172,6 @@ static inline void flush_tlb_kernel_range(unsigned long start, flush_tlb_all(); } -extern void zap_low_mappings(void); +extern void zap_low_mappings(bool early); #endif /* _ASM_X86_TLBFLUSH_H */ diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 7c80007ea5f..2fecda69ee6 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -873,7 +873,7 @@ int __cpuinit native_cpu_up(unsigned int cpu) err = do_boot_cpu(apicid, cpu); - zap_low_mappings(); + zap_low_mappings(false); low_mappings = 0; #else err = do_boot_cpu(apicid, cpu); diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 949708d7a48..9ff3c0816d1 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -564,7 +564,7 @@ static inline void save_pg_dir(void) } #endif /* !CONFIG_ACPI_SLEEP */ -void zap_low_mappings(void) +void zap_low_mappings(bool early) { int i; @@ -581,7 +581,11 @@ void zap_low_mappings(void) set_pgd(swapper_pg_dir+i, __pgd(0)); #endif } - flush_tlb_all(); + + if (early) + __flush_tlb(); + else + flush_tlb_all(); } pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP); @@ -956,7 +960,7 @@ void __init mem_init(void) test_wp_bit(); save_pg_dir(); - zap_low_mappings(); + zap_low_mappings(true); } #ifdef CONFIG_MEMORY_HOTPLUG |