x86/sgx: Drop 'page_index' from sgx_backing

Storing the 'page_index' value in the sgx_backing struct is
dead code and no longer needed.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20220708162124.8442-1-kristen@linux.intel.com

diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c
index 295a9c9..73bfc5a 100644 (file)
--- a/arch/x86/kernel/cpu/sgx/encl.c
+++ b/arch/x86/kernel/cpu/sgx/encl.c
@@ -943,7 +943,6 @@ int sgx_encl_get_backing(struct sgx_encl *encl, unsigned long page_index,
                return PTR_ERR(pcmd);
        }
 
-       backing->page_index = page_index;
        backing->contents = contents;
        backing->pcmd = pcmd;
        backing->pcmd_offset = page_pcmd_off & (PAGE_SIZE - 1);

diff --git a/arch/x86/kernel/cpu/sgx/encl.h b/arch/x86/kernel/cpu/sgx/encl.h
index 3d0e0ba..57cc236 100644 (file)
--- a/arch/x86/kernel/cpu/sgx/encl.h
+++ b/arch/x86/kernel/cpu/sgx/encl.h
@@ -79,7 +79,6 @@ struct sgx_va_page {
 };
 
 struct sgx_backing {
-       pgoff_t page_index;
        struct page *contents;
        struct page *pcmd;
        unsigned long pcmd_offset;