* [PATCH] correct call to free_pages to specify memory size in pages, not bytes.
@ 2013-07-25 0:48 Roy Franz
2013-07-25 0:48 ` Roy Franz
0 siblings, 1 reply; 3+ messages in thread
From: Roy Franz @ 2013-07-25 0:48 UTC (permalink / raw)
To: matt.fleming-ral2JQCrhuEAvxtiuMwx3w, hpa-YMNOUZJC4hwAvxtiuMwx3w
Cc: roy.franz-QSEj5FYQhm4dnm+yROfE0A, tglx-hfZtesqFncYOwBW4kG4KsQ,
mingo-H+wXaHxf7aLQT0dZR+AlfA, x86-DgEjT+Ai2ygdnm+yROfE0A,
linux-efi-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
I found this bug while working on the EFI stub for ARM - free_pages
is being passed memory size in bytes instead of pages. Since this is
unrelated to ARM, I am submitting this separately from the patch set
that adds EFI stub support for ARM. Those patches will depend on this
one, since the code in question is moved to a shared location and shared
by both x86 and ARM EFI stubs.
Roy Franz (1):
correct call to free_pages to specify memory size in pages, not
bytes.
arch/x86/boot/compressed/eboot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--
1.7.10.4
^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH] correct call to free_pages to specify memory size in pages, not bytes.
2013-07-25 0:48 [PATCH] correct call to free_pages to specify memory size in pages, not bytes Roy Franz
@ 2013-07-25 0:48 ` Roy Franz
2013-07-26 14:58 ` Matt Fleming
0 siblings, 1 reply; 3+ messages in thread
From: Roy Franz @ 2013-07-25 0:48 UTC (permalink / raw)
To: matt.fleming, hpa; +Cc: roy.franz, tglx, mingo, x86, linux-efi, linux-kernel
Signed-off-by: Roy Franz <roy.franz@linaro.org>
---
arch/x86/boot/compressed/eboot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index d606463..b7388a4 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -225,7 +225,7 @@ static void low_free(unsigned long size, unsigned long addr)
unsigned long nr_pages;
nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
- efi_call_phys2(sys_table->boottime->free_pages, addr, size);
+ efi_call_phys2(sys_table->boottime->free_pages, addr, nr_pages);
}
static void find_bits(unsigned long mask, u8 *pos, u8 *size)
--
1.7.10.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] correct call to free_pages to specify memory size in pages, not bytes.
2013-07-25 0:48 ` Roy Franz
@ 2013-07-26 14:58 ` Matt Fleming
0 siblings, 0 replies; 3+ messages in thread
From: Matt Fleming @ 2013-07-26 14:58 UTC (permalink / raw)
To: Roy Franz; +Cc: hpa, tglx, mingo, x86, linux-efi, linux-kernel
On 25/07/13 01:48, Roy Franz wrote:
> Signed-off-by: Roy Franz <roy.franz@linaro.org>
> ---
> arch/x86/boot/compressed/eboot.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
> index d606463..b7388a4 100644
> --- a/arch/x86/boot/compressed/eboot.c
> +++ b/arch/x86/boot/compressed/eboot.c
> @@ -225,7 +225,7 @@ static void low_free(unsigned long size, unsigned long addr)
> unsigned long nr_pages;
>
> nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
> - efi_call_phys2(sys_table->boottime->free_pages, addr, size);
> + efi_call_phys2(sys_table->boottime->free_pages, addr, nr_pages);
> }
>
> static void find_bits(unsigned long mask, u8 *pos, u8 *size)
Thanks Roy. I pulled this into my urgent queue, as it's obviously a bug
and I don't fancy our chances if we ask the firmware to free more memory
than it initially allocated.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-07-25 0:48 [PATCH] correct call to free_pages to specify memory size in pages, not bytes Roy Franz
2013-07-25 0:48 ` Roy Franz
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