diff options
| author | Borislav Petkov <bp@alien8.de> | 2015-06-19 13:49:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-29 12:35:28 -0700 |
| commit | 51fbd77c171936aed07cf5081741d8e3437d683b (patch) | |
| tree | 7bf05fabadd2891a2a099603127a43a1c7f13add /kernel | |
| parent | b953c0d234bc72e8489d3bf51a276c5c4ec85345 (diff) | |
x86/boot: Fix overflow warning with 32-bit binutils
commit 04c17341b42699a5859a8afa05e64ba08a4e5235 upstream.
When building the kernel with 32-bit binutils built with support
only for the i386 target, we get the following warning:
arch/x86/kernel/head_32.S:66: Warning: shift count out of range (32 is not between 0 and 31)
The problem is that in that case, binutils' internal type
representation is 32-bit wide and the shift range overflows.
In order to fix this, manipulate the shift expression which
creates the 4GiB constant to not overflow the shift count.
Suggested-by: Michael Matz <matz@suse.de>
Reported-and-tested-by: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions