diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-10-26 14:28:56 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-11-06 21:35:11 +0100 |
| commit | b082f2dd80612015cd6d9d84e52099734ec9a0e1 (patch) | |
| tree | 5e655c336fdbaad2ca54f34502616bfe619f3919 /arch/x86 | |
| parent | x86/ldt: Unmap PTEs for the slot before freeing LDT pages (diff) | |
| download | linux-b082f2dd80612015cd6d9d84e52099734ec9a0e1.tar.xz linux-b082f2dd80612015cd6d9d84e52099734ec9a0e1.zip | |
x86/ldt: Remove unused variable in map_ldt_struct()
Splitting out the sanity check in map_ldt_struct() moved page table syncing
into a separate function, which made the pgd variable unused. Remove it.
[ tglx: Massaged changelog ]
Fixes: 9bae3197e15d ("x86/ldt: Split out sanity check in map_ldt_struct()")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: dave.hansen@linux.intel.com
Cc: peterz@infradead.org
Cc: boris.ostrovsky@oracle.com
Cc: jgross@suse.com
Cc: bhe@redhat.com
Cc: willy@infradead.org
Cc: linux-mm@kvack.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181026122856.66224-4-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/ldt.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index 18e4525c5933..6135ae8ce036 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -207,7 +207,6 @@ map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot) bool is_vmalloc; spinlock_t *ptl; int i, nr_pages; - pgd_t *pgd; if (!static_cpu_has(X86_FEATURE_PTI)) return 0; @@ -221,13 +220,6 @@ map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot) /* Check if the current mappings are sane */ sanity_check_ldt_mapping(mm); - /* - * Did we already have the top level entry allocated? We can't - * use pgd_none() for this because it doens't do anything on - * 4-level page table kernels. - */ - pgd = pgd_offset(mm, LDT_BASE_ADDR); - is_vmalloc = is_vmalloc_addr(ldt->entries); nr_pages = DIV_ROUND_UP(ldt->nr_entries * LDT_ENTRY_SIZE, PAGE_SIZE); |