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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-02 07:15:50 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-02 07:15:50 +0300 |
| commit | a52bbaf4a3b81e07430a91ee37ea76557c2c02ed (patch) | |
| tree | 237b8878b7b68b41a4bfd549b34d174c8439c3a9 /arch/x86/mm | |
| parent | 16b76293c5c81e6345323d7aef41b26e8390f62d (diff) | |
| parent | 4797b7dfdfcf457075c36743d71e2b0feeaaa20f (diff) | |
| download | linux-a52bbaf4a3b81e07430a91ee37ea76557c2c02ed.tar.xz | |
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpu updates from Ingo Molnar:
"The biggest changes are an extension of the Intel RDT code to extend
it with Intel Memory Bandwidth Allocation CPU support: MBA allows
bandwidth allocation between cores, while CBM (already upstream)
allows CPU cache partitioning.
There's also misc smaller fixes and updates"
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
x86/intel_rdt: Return error for incorrect resource names in schemata
x86/intel_rdt: Trim whitespace while parsing schemata input
x86/intel_rdt: Fix padding when resource is enabled via mount
x86/intel_rdt: Get rid of anon union
x86/cpu: Keep model defines sorted by model number
x86/intel_rdt/mba: Add schemata file support for MBA
x86/intel_rdt: Make schemata file parsers resource specific
x86/intel_rdt/mba: Add info directory files for Memory Bandwidth Allocation
x86/intel_rdt: Make information files resource specific
x86/intel_rdt/mba: Add primary support for Memory Bandwidth Allocation (MBA)
x86/intel_rdt/mba: Memory bandwith allocation feature detect
x86/intel_rdt: Add resource specific msr update function
x86/intel_rdt: Move CBM specific data into a struct
x86/intel_rdt: Cleanup namespace to support multiple resource types
Documentation, x86: Intel Memory bandwidth allocation
x86/intel_rdt: Organize code properly
x86/intel_rdt: Init padding only if a device exists
x86/intel_rdt: Add cpus_list rdtgroup file
x86/intel_rdt: Cleanup kernel-doc
x86/intel_rdt: Update schemata read to show data in tabular format
...
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_32.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 1fa97c941abe..030bfed10a6c 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -716,15 +716,17 @@ void __init paging_init(void) */ static void __init test_wp_bit(void) { + int wp_works_ok; + printk(KERN_INFO "Checking if this processor honours the WP bit even in supervisor mode..."); /* Any page-aligned address will do, the test is non-destructive */ __set_fixmap(FIX_WP_TEST, __pa(&swapper_pg_dir), PAGE_KERNEL_RO); - boot_cpu_data.wp_works_ok = do_test_wp_bit(); + wp_works_ok = do_test_wp_bit(); clear_fixmap(FIX_WP_TEST); - if (!boot_cpu_data.wp_works_ok) { + if (!wp_works_ok) { printk(KERN_CONT "No.\n"); panic("Linux doesn't support CPUs with broken WP."); } else { @@ -811,8 +813,7 @@ void __init mem_init(void) BUG_ON(VMALLOC_START >= VMALLOC_END); BUG_ON((unsigned long)high_memory > VMALLOC_START); - if (boot_cpu_data.wp_works_ok < 0) - test_wp_bit(); + test_wp_bit(); } #ifdef CONFIG_MEMORY_HOTPLUG |