From: Roy Franz <roy.franz@linaro.org>
To: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
matt.fleming@intel.com
Cc: leif.lindholm@linaro.org, grant.likely@linaro.org,
msalter@redhat.com, Roy Franz <roy.franz@linaro.org>
Subject: [PATCH 14/18] Allow efi_free() to be called with size of 0, and do nothing in that case.
Date: Sun, 22 Sep 2013 15:45:38 -0700 [thread overview]
Message-ID: <1379889942-3135-15-git-send-email-roy.franz@linaro.org> (raw)
In-Reply-To: <1379889942-3135-1-git-send-email-roy.franz@linaro.org>
Make efi_free() safely callable with size of 0, similar to free() being
callable with NULL pointers.
Remove size checks that this makes redundant. This also avoids some
size checks in the ARM EFI stub code that will be added as well.
Signed-off-by: Roy Franz <roy.franz@linaro.org>
---
arch/x86/boot/compressed/eboot.c | 3 +--
drivers/firmware/efi/efi-stub-helper.c | 3 +++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 05f11c7..8b86772 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -505,8 +505,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
return boot_params;
fail2:
- if (options_size)
- efi_free(sys_table, options_size, hdr->cmd_line_ptr);
+ efi_free(sys_table, options_size, hdr->cmd_line_ptr);
fail:
efi_free(sys_table, 0x4000, (unsigned long)boot_params);
return NULL;
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
index b0b2f15..73cf86b 100644
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ b/drivers/firmware/efi/efi-stub-helper.c
@@ -253,6 +253,9 @@ static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
{
unsigned long nr_pages;
+ if (!size)
+ return;
+
nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
efi_call_phys2(sys_table_arg->boottime->free_pages, addr, nr_pages);
}
--
1.7.10.4
next prev parent reply other threads:[~2013-09-22 22:46 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-22 22:45 [PATCH V5 00/18] ARM EFI stub common code Roy Franz
2013-09-22 22:45 ` [PATCH 01/18] EFI stub documentation updates Roy Franz
2013-09-22 22:45 ` [PATCH 02/18] Add proper definitions for some EFI function pointers Roy Franz
2013-09-22 22:45 ` [PATCH 03/18] Move common EFI stub code from x86 arch code to common location Roy Franz
2013-09-22 22:45 ` [PATCH 04/18] Add system table pointer argument to shared functions Roy Franz
2013-09-22 22:45 ` [PATCH 05/18] Rename memory allocation/free functions Roy Franz
2013-09-22 22:45 ` [PATCH 06/18] Enforce minimum alignment of 1 page on allocations Roy Franz
2013-09-25 12:01 ` Matt Fleming
2013-09-22 22:45 ` [PATCH 07/18] Move relocate_kernel() to shared file Roy Franz
2013-09-22 22:45 ` [PATCH 08/18] Generalize relocate_kernel() for use by other architectures Roy Franz
2013-09-25 12:01 ` Matt Fleming
2013-09-22 22:45 ` [PATCH 09/18] Move unicode to ASCII conversion to shared function Roy Franz
2013-09-25 12:01 ` Matt Fleming
2013-09-22 22:45 ` [PATCH 10/18] Do proper conversion from UTF-16 to UTF-8 Roy Franz
2013-09-22 22:54 ` H. Peter Anvin
2013-09-22 23:07 ` Roy Franz
2013-09-23 0:24 ` H. Peter Anvin
2013-09-25 12:01 ` Matt Fleming
2013-09-25 14:15 ` Roy Franz
2013-09-22 22:45 ` [PATCH 11/18] Rename __get_map() to efi_get_memory_map() Roy Franz
2013-09-22 22:45 ` [PATCH 12/18] generalize efi_get_memory_map() Roy Franz
2013-09-22 22:45 ` [PATCH 13/18] use efi_get_memory_map() to get final map for x86 Roy Franz
2013-09-22 22:45 ` Roy Franz [this message]
2013-09-22 22:45 ` [PATCH 15/18] Generalize handle_ramdisks() and rename to handle_cmdline_files() Roy Franz
2013-09-22 22:45 ` [PATCH 16/18] Renames in handle_cmdline_files() to complete generalization Roy Franz
2013-09-22 22:45 ` [PATCH 17/18] Fix types in EFI calls to match EFI function definitions Roy Franz
2013-09-22 22:45 ` [PATCH 18/18] resolve warnings found on ARM compile Roy Franz
2013-09-25 12:11 ` [PATCH V5 00/18] ARM EFI stub common code Matt Fleming
2013-09-25 12:21 ` Matt Fleming
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1379889942-3135-15-git-send-email-roy.franz@linaro.org \
--to=roy.franz@linaro.org \
--cc=grant.likely@linaro.org \
--cc=leif.lindholm@linaro.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matt.fleming@intel.com \
--cc=msalter@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).