[PATCH] x86/vdso: Make vdso2c print the number of sections needed on error

[H. Peter Anvin]

If we run out of space for section, at least make the error message
print the amount of space we need so we can actually diagnose it.
Furthermore, the test should be > instead of >= (it is okay to have
exactly the maximum number of sections.)

Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140622084754.GA15094@xxxxxxxxx
---
 arch/x86/vdso/vdso2c.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/vdso/vdso2c.h b/arch/x86/vdso/vdso2c.h
index f42e2ddc663d..94158e100f26 100644
--- a/arch/x86/vdso/vdso2c.h
+++ b/arch/x86/vdso/vdso2c.h
@@ -99,8 +99,9 @@ static void BITSFUNC(copy_section)(struct BITSFUNC(fake_sections) *out,
 	if (!copy)
 		return;
 
-	if (out->count >= out->max_count)
-		fail("too many copied sections (max = %d)\n", out->max_count);
+	if (out->count > out->max_count)
+		fail("too many copied sections (max = %d, need = %d)\n",
+		     out->max_count, out->count);
 
 	if (in_idx == out->in_shstrndx)
 		out->out_shstrndx = out->count;
-- 
1.9.3


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