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authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-01 11:20:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-01 11:20:53 -0700
commit459e3a21535ae3c7a9a123650e54f5c882b8fcbf (patch)
treef7b474b889c4ec014cf6611891ef5bdef6399e57
parentcf676908846a06443fa5e6724ca3f5dd7460eca1 (diff)
gcc-9: properly declare the {pv,hv}clock_page storage
The pvlock_page and hvclock_page variables are (as the name implies) addresses to pages, created by the linker script. But we declared them as just "extern u8" variables, which _works_, but now that gcc does some more bounds checking, it causes warnings like warning: array subscript 1 is outside array bounds of ‘u8[1]’ when we then access more than one byte from those variables. Fix this by simply making the declaration of the variables match reality, which makes the compiler happy too. Signed-off-by: Linus Torvalds <torvalds@-linux-foundation.org>
-rw-r--r--arch/x86/entry/vdso/vclock_gettime.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c
index 007b3fe9d727..98c7d12b945c 100644
--- a/arch/x86/entry/vdso/vclock_gettime.c
+++ b/arch/x86/entry/vdso/vclock_gettime.c
@@ -29,12 +29,12 @@ extern int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
extern time_t __vdso_time(time_t *t);
#ifdef CONFIG_PARAVIRT_CLOCK
-extern u8 pvclock_page
+extern u8 pvclock_page[PAGE_SIZE]
__attribute__((visibility("hidden")));
#endif
#ifdef CONFIG_HYPERV_TSCPAGE
-extern u8 hvclock_page
+extern u8 hvclock_page[PAGE_SIZE]
__attribute__((visibility("hidden")));
#endif