From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: linux-sgx@vger.kernel.org
Subject: [PATCH for_v23 1/3] x86/sgx: Update the free page count in a single operation
Date: Tue, 22 Oct 2019 15:49:20 -0700 [thread overview]
Message-ID: <20191022224922.28144-2-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20191022224922.28144-1-sean.j.christopherson@intel.com>
Use atomic_add() instead of running atomic_inc() in a loop to manually
do the equivalent addition.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kernel/cpu/sgx/main.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 499a9b0740c8..d45bf6fca0c8 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -195,8 +195,7 @@ static bool __init sgx_alloc_epc_section(u64 addr, u64 size,
list_add_tail(&page->list, §ion->unsanitized_page_list);
}
- for (i = 0; i < nr_pages; i++)
- atomic_inc(&sgx_nr_free_pages);
+ atomic_add(nr_pages, &sgx_nr_free_pages);
return true;
--
2.22.0
next prev parent reply other threads:[~2019-10-22 22:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-22 22:49 [PATCH for_v23 0/3] x86/sgx: More cleanup for v23 Sean Christopherson
2019-10-22 22:49 ` Sean Christopherson [this message]
2019-10-23 12:44 ` [PATCH for_v23 1/3] x86/sgx: Update the free page count in a single operation Jarkko Sakkinen
2019-10-24 13:11 ` Jarkko Sakkinen
2019-10-22 22:49 ` [PATCH for_v23 2/3] x86/sgx: Do not add in-use EPC page to the free page list Sean Christopherson
2019-10-23 12:43 ` Jarkko Sakkinen
2019-10-23 15:23 ` Sean Christopherson
2019-10-22 22:49 ` [PATCH for_v23 3/3] x86/sgx: Move reclaim logic out of sgx_free_page() Sean Christopherson
2019-10-23 12:42 ` Jarkko Sakkinen
2019-10-23 15:19 ` Sean Christopherson
2019-10-24 18:35 ` [PATCH for_v23 0/3] x86/sgx: More cleanup for v23 Jarkko Sakkinen
2019-10-24 20:22 ` Sean Christopherson
2019-10-28 20:35 ` Jarkko Sakkinen
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