linux-kernel - [tip:core/efi] efi: Fix warning of int-to-pointer-cast on x86 32-bit builds

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Message-ID: <tip-78b9bc947b18ed16b6c2c573d774e6d54ad9452d@git.kernel.org>
Date:	Wed, 28 Oct 2015 13:57:57 -0700
From:	tip-bot for Taku Izumi <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	torvalds@...ux-foundation.org, izumi.taku@...fujitsu.com,
	matt@...eblueprint.co.uk, mingo@...nel.org, peterz@...radead.org,
	ard.biesheuvel@...aro.org
Subject: [tip:core/efi] efi:
  Fix warning of int-to-pointer-cast on x86 32-bit builds

Commit-ID:  78b9bc947b18ed16b6c2c573d774e6d54ad9452d
Gitweb:     http://git.kernel.org/tip/78b9bc947b18ed16b6c2c573d774e6d54ad9452d
Author:     Taku Izumi <izumi.taku@...fujitsu.com>
AuthorDate: Fri, 23 Oct 2015 11:48:17 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 28 Oct 2015 12:28:06 +0100

efi: Fix warning of int-to-pointer-cast on x86 32-bit builds

Commit:

  0f96a99dab36 ("efi: Add "efi_fake_mem" boot option")

introduced the following warning message:

  drivers/firmware/efi/fake_mem.c:186:20: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

new_memmap_phy was defined as a u64 value and cast to void*,
causing a int-to-pointer-cast warning on x86 32-bit builds.
However, since the void* type is inappropriate for a physical
address, the definition of struct efi_memory_map::phys_map has
been changed to phys_addr_t in the previous patch, and so the
cast can be dropped entirely.

This patch also changes the type of the "new_memmap_phy"
variable from "u64" to "phys_addr_t" to align with the types of
memblock_alloc() and struct efi_memory_map::phys_map.

Reported-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
[ Removed void* cast, updated commit log]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Reviewed-by: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: kamezawa.hiroyu@...fujitsu.com
Cc: linux-efi@...r.kernel.org
Cc: matt.fleming@...el.com
Link: http://lkml.kernel.org/r/1445593697-1342-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 drivers/firmware/efi/fake_mem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/efi/fake_mem.c b/drivers/firmware/efi/fake_mem.c
index 32bcb14..ed3a854 100644
--- a/drivers/firmware/efi/fake_mem.c
+++ b/drivers/firmware/efi/fake_mem.c
@@ -59,7 +59,7 @@ void __init efi_fake_memmap(void)
 	u64 start, end, m_start, m_end, m_attr;
 	int new_nr_map = memmap.nr_map;
 	efi_memory_desc_t *md;
-	u64 new_memmap_phy;
+	phys_addr_t new_memmap_phy;
 	void *new_memmap;
 	void *old, *new;
 	int i;
@@ -183,7 +183,7 @@ void __init efi_fake_memmap(void)
 	/* swap into new EFI memmap */
 	efi_unmap_memmap();
 	memmap.map = new_memmap;
-	memmap.phys_map = (void *)new_memmap_phy;
+	memmap.phys_map = new_memmap_phy;
 	memmap.nr_map = new_nr_map;
 	memmap.map_end = memmap.map + memmap.nr_map * memmap.desc_size;
 	set_bit(EFI_MEMMAP, &efi.flags);
--
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