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arm64: KVM: hyp: debug-sr: Mark expected switch fall-through

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When fall-through warnings was enabled by default the following warnings
was starting to show up:

../arch/arm64/kvm/hyp/debug-sr.c: In function ‘__debug_save_state’:
../arch/arm64/kvm/hyp/debug-sr.c:20:19: warning: this statement may fall
 through [-Wimplicit-fallthrough=]
  case 15: ptr[15] = read_debug(reg, 15);   \
../arch/arm64/kvm/hyp/debug-sr.c:113:2: note: in expansion of macro ‘save_debug’
  save_debug(dbg->dbg_bcr, dbgbcr, brps);
  ^~~~~~~~~~
../arch/arm64/kvm/hyp/debug-sr.c:21:2: note: here
  case 14: ptr[14] = read_debug(reg, 14);   \
  ^~~~
../arch/arm64/kvm/hyp/debug-sr.c:113:2: note: in expansion of macro ‘save_debug’
  save_debug(dbg->dbg_bcr, dbgbcr, brps);
  ^~~~~~~~~~
../arch/arm64/kvm/hyp/debug-sr.c:21:19: warning: this statement may fall
 through [-Wimplicit-fallthrough=]
  case 14: ptr[14] = read_debug(reg, 14);   \
../arch/arm64/kvm/hyp/debug-sr.c:113:2: note: in expansion of macro ‘save_debug’
  save_debug(dbg->dbg_bcr, dbgbcr, brps);
  ^~~~~~~~~~
../arch/arm64/kvm/hyp/debug-sr.c:22:2: note: here
  case 13: ptr[13] = read_debug(reg, 13);   \
  ^~~~
../arch/arm64/kvm/hyp/debug-sr.c:113:2: note: in expansion of macro ‘save_debug’
  save_debug(dbg->dbg_bcr, dbgbcr, brps);
  ^~~~~~~~~~

Rework to add a 'Fall through' comment where the compiler warned
about fall-through, hence silencing the warning.

Fixes: d93512ef0f0e ("Makefile: Globally enable fall-through warning")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
[maz: fixed commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Anders Roxell 2019-07-26 13:27:10 +02:00 committed by Marc Zyngier
parent 6701c619fa
commit cdb2d3ee04
1 changed files with 30 additions and 0 deletions
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30
arch/arm64/kvm/hyp/debug-sr.c
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@ -18,40 +18,70 @@
#define save_debug(ptr,reg,nr) \
switch (nr) { \
case 15: ptr[15] = read_debug(reg, 15); \
/* Fall through */ \
case 14: ptr[14] = read_debug(reg, 14); \
/* Fall through */ \
case 13: ptr[13] = read_debug(reg, 13); \
/* Fall through */ \
case 12: ptr[12] = read_debug(reg, 12); \
/* Fall through */ \
case 11: ptr[11] = read_debug(reg, 11); \
/* Fall through */ \
case 10: ptr[10] = read_debug(reg, 10); \
/* Fall through */ \
case 9: ptr[9] = read_debug(reg, 9); \
/* Fall through */ \
case 8: ptr[8] = read_debug(reg, 8); \
/* Fall through */ \
case 7: ptr[7] = read_debug(reg, 7); \
/* Fall through */ \
case 6: ptr[6] = read_debug(reg, 6); \
/* Fall through */ \
case 5: ptr[5] = read_debug(reg, 5); \
/* Fall through */ \
case 4: ptr[4] = read_debug(reg, 4); \
/* Fall through */ \
case 3: ptr[3] = read_debug(reg, 3); \
/* Fall through */ \
case 2: ptr[2] = read_debug(reg, 2); \
/* Fall through */ \
case 1: ptr[1] = read_debug(reg, 1); \
/* Fall through */ \
default: ptr[0] = read_debug(reg, 0); \
}
#define restore_debug(ptr,reg,nr) \
switch (nr) { \
case 15: write_debug(ptr[15], reg, 15); \
/* Fall through */ \
case 14: write_debug(ptr[14], reg, 14); \
/* Fall through */ \
case 13: write_debug(ptr[13], reg, 13); \
/* Fall through */ \
case 12: write_debug(ptr[12], reg, 12); \
/* Fall through */ \
case 11: write_debug(ptr[11], reg, 11); \
/* Fall through */ \
case 10: write_debug(ptr[10], reg, 10); \
/* Fall through */ \
case 9: write_debug(ptr[9], reg, 9); \
/* Fall through */ \
case 8: write_debug(ptr[8], reg, 8); \
/* Fall through */ \
case 7: write_debug(ptr[7], reg, 7); \
/* Fall through */ \
case 6: write_debug(ptr[6], reg, 6); \
/* Fall through */ \
case 5: write_debug(ptr[5], reg, 5); \
/* Fall through */ \
case 4: write_debug(ptr[4], reg, 4); \
/* Fall through */ \
case 3: write_debug(ptr[3], reg, 3); \
/* Fall through */ \
case 2: write_debug(ptr[2], reg, 2); \
/* Fall through */ \
case 1: write_debug(ptr[1], reg, 1); \
/* Fall through */ \
default: write_debug(ptr[0], reg, 0); \
}