Re: [PATCH kernel] powerpc/lpar/debug: Initialize flags before printing debug message
On 09/01/18 16:52, Alexey Kardashevskiy wrote: > With enabled DEBUG, there is a compile error: > "error: ‘flags’ is used uninitialized in this function". > > This moves pr_devel() little further where @flags are initialized. > > Signed-off-by: Alexey KardashevskiyPing? > --- > > /home/aik/p/guest-kernel/arch/powerpc/platforms/pseries/lpar.c: In function > ‘pSeries_lpar_hpte_updatepp’: > /home/aik/p/guest-kernel/include/linux/printk.h:320:2: error: ‘flags’ is used > uninitialized in this function [-Werror=un > initialized] > printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) > ^ > /home/aik/p/guest-kernel/arch/powerpc/platforms/pseries/lpar.c:304:16: note: > ‘flags’ was declared here > unsigned long flags; > ^ > --- > arch/powerpc/platforms/pseries/lpar.c | 10 +- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/arch/powerpc/platforms/pseries/lpar.c > b/arch/powerpc/platforms/pseries/lpar.c > index 0ee4a46..1365424 100644 > --- a/arch/powerpc/platforms/pseries/lpar.c > +++ b/arch/powerpc/platforms/pseries/lpar.c > @@ -306,14 +306,14 @@ static long pSeries_lpar_hpte_updatepp(unsigned long > slot, > > want_v = hpte_encode_avpn(vpn, psize, ssize); > > + flags = (newpp & 7) | H_AVPN; > + if (mmu_has_feature(MMU_FTR_KERNEL_RO)) > + /* Move pp0 into bit 8 (IBM 55) */ > + flags |= (newpp & HPTE_R_PP0) >> 55; > + > pr_devel("update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", >want_v, slot, flags, psize); > > - flags = (newpp & 7) | H_AVPN; > - if (mmu_has_feature(MMU_FTR_KERNEL_RO)) > - /* Move pp0 into bit 8 (IBM 55) */ > - flags |= (newpp & HPTE_R_PP0) >> 55; > - > lpar_rc = plpar_pte_protect(flags, slot, want_v); > > if (lpar_rc == H_NOT_FOUND) { > -- Alexey
[PATCH kernel] powerpc/lpar/debug: Initialize flags before printing debug message
With enabled DEBUG, there is a compile error: "error: ‘flags’ is used uninitialized in this function". This moves pr_devel() little further where @flags are initialized. Signed-off-by: Alexey Kardashevskiy--- /home/aik/p/guest-kernel/arch/powerpc/platforms/pseries/lpar.c: In function ‘pSeries_lpar_hpte_updatepp’: /home/aik/p/guest-kernel/include/linux/printk.h:320:2: error: ‘flags’ is used uninitialized in this function [-Werror=un initialized] printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) ^ /home/aik/p/guest-kernel/arch/powerpc/platforms/pseries/lpar.c:304:16: note: ‘flags’ was declared here unsigned long flags; ^ --- arch/powerpc/platforms/pseries/lpar.c | 10 +- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 0ee4a46..1365424 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -306,14 +306,14 @@ static long pSeries_lpar_hpte_updatepp(unsigned long slot, want_v = hpte_encode_avpn(vpn, psize, ssize); + flags = (newpp & 7) | H_AVPN; + if (mmu_has_feature(MMU_FTR_KERNEL_RO)) + /* Move pp0 into bit 8 (IBM 55) */ + flags |= (newpp & HPTE_R_PP0) >> 55; + pr_devel("update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", want_v, slot, flags, psize); - flags = (newpp & 7) | H_AVPN; - if (mmu_has_feature(MMU_FTR_KERNEL_RO)) - /* Move pp0 into bit 8 (IBM 55) */ - flags |= (newpp & HPTE_R_PP0) >> 55; - lpar_rc = plpar_pte_protect(flags, slot, want_v); if (lpar_rc == H_NOT_FOUND) { -- 2.11.0