[PATCHv3 3/3] x86/ldt: Remove unused variable in map_ldt_struct()

Kirill A. Shutemov
2018-10-26T12:29:03Z

Commit

9bae3197e15d ("x86/ldt: Split out sanity check in map_ldt_struct()")

moved page table syncing into a separate funtion. pgd variable is now
unsed in map_ldt_struct().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/x86/kernel/ldt.c | 8 --------
1 file changed, 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index e32f3427438a..5dc8ed202fa8 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -206,7 +206,6 @@ map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot)
unsigned long va;
bool is_vmalloc;
spinlock_t *ptl;
- pgd_t *pgd;
int i, nr_pages;

if (!static_cpu_has(X86_FEATURE_PTI))
@@ -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);
--
2.19.1