Messages in this thread Patch in this message | | | From | Jason Yan <> | Subject | [PATCH] f2fs: Eliminate usage of uninitialized_var() macro | Date | Mon, 15 Jun 2020 16:51:32 +0800 |
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This is an effort to eliminate the uninitialized_var() macro[1].
The use of this macro is the wrong solution because it forces off ANY analysis by the compiler for a given variable. It even masks "unused variable" warnings.
Quoted from Linus[2]:
"It's a horrible thing to use, in that it adds extra cruft to the source code, and then shuts up a compiler warning (even the _reliable_ warnings from gcc)."
Fix it by remove this variable since it is not needed at all.
[1] https://github.com/KSPP/linux/issues/81 [2] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
Cc: Kees Cook <keescook@chromium.org> Suggested-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> --- v2: Directly remove this variable.
fs/f2fs/data.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 326c63879ddc..3753ba06531b 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2856,7 +2856,6 @@ static int f2fs_write_cache_pages(struct address_space *mapping, }; #endif int nr_pages; - pgoff_t uninitialized_var(writeback_index); pgoff_t index; pgoff_t end; /* Inclusive */ pgoff_t done_index; @@ -2875,8 +2874,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping, clear_inode_flag(mapping->host, FI_HOT_DATA); if (wbc->range_cyclic) { - writeback_index = mapping->writeback_index; /* prev offset */ - index = writeback_index; + index = mapping->writeback_index; /* prev offset */ end = -1; } else { index = wbc->range_start >> PAGE_SHIFT; -- 2.25.4
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