Messages in this thread Patch in this message | | | Date | Fri, 9 Mar 2018 01:13:19 -0800 | From | tip-bot for Jia-Ju Bai <> | Subject | [tip:efi/core] x86/efi: Replace GFP_ATOMIC with GFP_KERNEL in efi_query_variable_store() |
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Commit-ID: 9f66d8d73e654c5f867daa6aa186300ecaf49d3a Gitweb: https://git.kernel.org/tip/9f66d8d73e654c5f867daa6aa186300ecaf49d3a Author: Jia-Ju Bai <baijiaju1990@gmail.com> AuthorDate: Thu, 8 Mar 2018 08:00:14 +0000 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 9 Mar 2018 08:58:22 +0100
x86/efi: Replace GFP_ATOMIC with GFP_KERNEL in efi_query_variable_store()
efi_query_variable_store() does an atomic kzalloc() unnecessarily, because we can never get this far when called in an atomic context, namely when nonblocking == 1.
Replace it with GFP_KERNEL.
This was found by the DCNS static analysis tool written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20180308080020.22828-7-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/platform/efi/quirks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index 5b513ccffde4..1ef11c26f79b 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -177,7 +177,7 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size, * that by attempting to use more space than is available. */ unsigned long dummy_size = remaining_size + 1024; - void *dummy = kzalloc(dummy_size, GFP_ATOMIC); + void *dummy = kzalloc(dummy_size, GFP_KERNEL); if (!dummy) return EFI_OUT_OF_RESOURCES;
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