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| author |   Jan Beulich <JBeulich@suse.com> | 2014-07-03 15:35:07 +0100 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2014-07-10 16:06:04 -0700 |
| commit | d093601be5e97d2729614419d0d256ed3b6a56b0 (patch) | |
| tree | 3893d95782be8f751f9aef7406e14d82ca832af1 /arch | |
| parent | x86-64, vdso: Fix vDSO build breakage due to empty .rela.dyn (diff) | |
| download | linux-dev-d093601be5e97d2729614419d0d256ed3b6a56b0.tar.xz linux-dev-d093601be5e97d2729614419d0d256ed3b6a56b0.zip | |
x86-32, vdso: Fix vDSO build error due to missing align_vdso_addr()
Relying on static functions used just once to get inlined (and
subsequently have dead code paths eliminated) is wrong: Compilers are
free to decide whether they do this, regardless of optimization level.
With this not happening for vdso_addr() (observed with gcc 4.1.x), an
unresolved reference to align_vdso_addr() causes the build to fail.
[ hpa: vdso_addr() is never actually used on x86-32, as calculate_addr
in map_vdso() is always false. It ought to be possible to clean
this up further, but this fixes the immediate problem. ]
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/53B5863B02000078000204D5@mail.emea.novell.com
Acked-by: Andy Lutomirski <luto@amacapital.net>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/vdso/vma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c index e1513c47872a..5a5176de8d0a 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/vdso/vma.c @@ -62,6 +62,9 @@ struct linux_binprm; Only used for the 64-bit and x32 vdsos. */ static unsigned long vdso_addr(unsigned long start, unsigned len) { +#ifdef CONFIG_X86_32 + return 0; +#else unsigned long addr, end; unsigned offset; end = (start + PMD_SIZE - 1) & PMD_MASK; @@ -83,6 +86,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned len) addr = align_vdso_addr(addr); return addr; +#endif } static int map_vdso(const struct vdso_image *image, bool calculate_addr) |