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[PULL,07/15] exec: replace ffsl with ctzl

Message ID 1402496993-27206-8-git-send-email-peter.maydell@linaro.org
State New
Headers show

Commit Message

Peter Maydell June 11, 2014, 2:29 p.m. UTC 
From: Natanael Copa <ncopa@alpinelinux.org>

See commit fbeadf50 (bitops: unify bitops_ffsl with the one in
host-utils.h, call it bitops_ctzl) on why ctzl should be used instead
of ffsl.

This is also needed for musl libc which does not implement ffsl.

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/exec/ram_addr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 2edfa96..b94de02 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -117,7 +117,7 @@  static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
             if (bitmap[i] != 0) {
                 c = leul_to_cpu(bitmap[i]);
                 do {
-                    j = ffsl(c) - 1;
+                    j = ctzl(c);
                     c &= ~(1ul << j);
                     page_number = (i * HOST_LONG_BITS + j) * hpratio;
                     addr = page_number * TARGET_PAGE_SIZE;