[PATCH v2 1/2] x86/sgx: Do not update sgx_nr_free_pages in sgx_setup_epc_section()

From: Jarkko Sakkinen <jarkko@kernel.org>
To: linux-sgx@vger.kernel.org
Cc: Jarkko Sakkinen <jarkko@kernel.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/2] x86/sgx: Do not update sgx_nr_free_pages in sgx_setup_epc_section()
Date: Tue,  6 Apr 2021 02:26:52 +0300	[thread overview]
Message-ID: <20210405232653.33680-1-jarkko@kernel.org> (raw)

Now that the sanitization process will make pages available by calling
sgx_free_epc_page(), sgx_setup_epc_section() should not touch to
sgx_nr_free_pages. This will result sgx_nr_free_pages to contain 2x the
number of actual free pages. Simply, remove the statement.

Fixes: 51ab30eb2ad4 ("x86/sgx: Replace section->init_laundry_list with sgx_dirty_page_list")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 arch/x86/kernel/cpu/sgx/main.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 13a7599ce7d4..7df7048cb1c9 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -657,7 +657,6 @@ static bool __init sgx_setup_epc_section(u64 phys_addr, u64 size,
 		list_add_tail(&section->pages[i].list, &sgx_dirty_page_list);
 	}
 
-	sgx_nr_free_pages += nr_pages;
 	return true;
 }
 
-- 
2.31.1

